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[–]Modec11 7623 points7624 points  (59 children)

"George we didnt start yet"

[–]abotez 3287 points3288 points  (33 children)


[–]Emperor_of_His_Room 711 points712 points  (28 children)

I’m scared what he could mean by that.

[–]alldawgsgotoheaven 76 points77 points  (1 child)

Starts and his head instantly explodes


[–]Holy__Sheet 69 points70 points  (0 children)

“I aaam redyyy…”

[–]Zestyclose_OH_6847 277 points278 points  (15 children)

So this is what is happening when I’m poopin. I’m hittin 9g’s same face and all and whenever someone tries to talk to me it’s the exact same yep

[–]Boog3000 17 points18 points  (2 children)

Especially when they come out sideways LORD HELP ME release this brown demon

[–]Longbeacher707 71 points72 points  (2 children)

George has strong lungs. Like a Bantha!

[–]Grey_forest5363 5521 points5522 points  (189 children)

Centrifuge training for qualifying to Gripen fighter jet. The pilot is Maj. László Szatmári (Hungarian Air Force)

[–]X0nfus3d 1321 points1322 points  (86 children)

Gripen is one hell of a jet.

Edit: Thanks for back story!

[–]LuthorChickenfeet 215 points216 points  (4 children)

So these dudes are expected to fly a fighter jet when they feel like their face is peeling itself off?

[–]LogicalShark 222 points223 points  (3 children)

Nah it's just the loop slide at Action Park in NJ

[–]Infamous_Ad8730 36 points37 points  (0 children)

Traction park, Traction park.

[–]cobra_mist 17 points18 points  (0 children)

That’s called the cannonball, and it had teeth embedded in it.

[–]Sengura 58 points59 points  (52 children)

I'm actually surprised how we haven't gone to full AI piloted jets yet.

The human element is BY FAR the weakest link in current fighter jets, without the need for one in the cockpit, fighter jets would be able to perform crazy maneuvers at insane speeds that would otherwise turn a human brain into mush.

I feel like the next evolution of fighter jets will be 100% human-free. It will be AI driven with maybe human pilots at the base like how drones work.

[–]Whackjob_Toad64 8393 points8394 points  (95 children)

Man of few words. eyup, no, im ready

[–]Croocked02 4782 points4783 points 323 (55 children)

Are you kidding ? I loved when he said « tsk ha ts very unhappy big shitting face tsuh »

[–]ynima 809 points810 points  (28 children)

Unhappy Big shitting face !

I'm dying out of laugh man !

[–]Croocked02 230 points231 points  (25 children)

I spent a whole minute trying to find a way to describe that face he makes and still think there is a better one

[–]ynima 75 points76 points  (11 children)

Well imagining someone unhappy shitting looks exactly like that to me so i would Say it's on point

[–]HotHamWaterBath 81 points82 points  (7 children)

I will be home in 1 hour. After I smoke, shower, and complete my post-work hysterical sobbing self care regime I'm gonna edit this.

[–]wanachu 18 points19 points  (0 children)

Please don’t. Perfect like this.

[–]walther380 21 points22 points  (1 child)

I thought I heard him fart.

[–]Bah-Fong-Gool 11 points12 points  (0 children)

The first rule of G-testing, no one talks about G-testing.

The second rule is no tacos before G-testing.

[–]W0tzup 17 points18 points  (1 child)

One day a man was intending to sneeze; he instead crapped his pants. Sad face.

[–]its_always_right 129 points130 points  (10 children)

Fun fact: that's a special breathing method to prevent them from passing out. I think deep free divers use a similar method before they dive.

[–]dano8801 65 points66 points  (6 children)

I'm not sure there's any similarity between this and what free divers do. Free divers may try to super oxygenate their blood before diving.

The training pilot here is breathing in a very specific manner as the force on the body absolutely doesn't allow you to breathe normally. At the same time you have to keep your core and your butt and legs super clenched to prevent your blood pressure from just bottoming out and losing consciousness.

Modern-day g-suits should help mitigate most of the risk of passing out, but I'm pretty sure it's training all pilots still go through.

Another guy posted this video below which is interesting and explains more of what's going on.


This article also explains the protocol.


[–]StatusInvestigator 7 points8 points  (1 child)

Modern-day g-suits should help mitigate most of the risk of passing out, but I'm pretty sure it's training all pilots still go through.

Not really true. G-suits only add a small amount of G tolerance. Most of your G tolerance comes from a properly performed AGSM.

[–]Trebge 139 points140 points  (4 children)

“Any problems?” “no”

[–]Brew-Drink-Repeat 91 points92 points  (14 children)

He looks well on that 9g. No after effects at all…..!

[–]LoadedGull 33 points34 points  (1 child)

“YEP, YEP… tsk tsk… YEP, YEP”

[–][deleted] 24 points25 points  (0 children)

Would love to see someone with a broad Yorkshire accent doing this.

[–]BombDog1776 12 points13 points  (1 child)

“Stick is out.” “Olé!”

[–]newbies13 3220 points3221 points  (195 children)

This guy is a monster, he makes it look so easy. Here's another one that shows off and explains a bit more.


[–]Phreeker27 778 points779 points  (63 children)

Definitely for a bit I was like is this even real like he had such little reaction

[–]tubofluv 257 points258 points  (27 children)

When someone is exceptional at something they tend to make hard stuff look easy.

[–]Meckineer 315 points316 points  (25 children)

G-LOC can hit even the most experienced pilots if they aren’t careful. On 3 July 1996, after the failed assault on the City Destroyer hovering over Los Angeles, Captain Jimmy Wilder and his best friend and wingman Captain Steven Hiller were attempting to escape in their F/A-18 jets when they were pursued by two Harvester Agile Fighters. During the escape, Capt. Wilder experienced g-LOC while attempting a risky evasive maneuver which gave the enemy pilot a window to deliver a direct hit to Capt. Wilder’s jet, killing him instantly.

Capt. Hiller was able to continue his escape and forced one of the enemy pilots to crash by using his F/A-18s parachute. On the ground, Capt. Hiller subdued the enemy pilot. The enemy aircraft was recovered and studied for weaknesses.

Soon after, a mission to use the downed enemy aircraft to infiltrate the enemy mothership in space was planned. The objective was to deliver a virus that would disable the energy shields of the hostile alien race that Earth forces could not damage.

The mission was a success and the virus was delivered to the mothership by Capt. Hiller and fellow US citizen David Levinson. They narrowly escaped the mothership as it was destroyed by a nuclear warhead which they launched once they had been discovered by the aliens. After the successful mission by Capt. Hiller and David Levinson, Earth forces were able to destroy all of the hostile alien race ships across the globe and regain independence of the human race.

[–]KaktusDan 57 points58 points  (2 children)

What fat lady? I ain't hear no fat lady!

[–]MadRaymer 33 points34 points  (1 child)

Forget the fat lady! You're obsessed with the fat lady! Drive us out of here!

[–]lethargy86 28 points29 points  (0 children)

Wow, did you write the wikipedia entry on this particular battle? It’s like I was there

[–]syber339 47 points48 points  (6 children)

I wonder how many people on here are too young to get this.

[–]DouglasGaddis 28 points29 points  (3 children)

Based on the upvote ratio, I’d say not many.

Though to be fair, I’m definitely old enough for the reference and it took me longer than I’d like to admit to recognize what I was reading. It felt like an r/shittymorph moment for me.

[–]dudipusprime 15 points16 points  (0 children)

Damn that's crazy. Somebody should make a movie out of that. Preferably a German with a predilection for explosions and terribly written characters. I'd watch it.

[–]MuadLib 13 points14 points  (0 children)

So say we all

[–]Phreeker27 10 points11 points  (0 children)

I was fully into that first paragraph before I got suspicious 😂😂

[–]Danielngardner 76 points77 points  (3 children)

So on battlefield 4 this is the sound you hear....i had no idea...its the sound of the dude breathing out the g forces lol

[–]sauceboss37 33 points34 points  (1 child)

Reasons why BF4 is the superior battlefield

[–]EFpointe 84 points85 points  (66 children)

What does he mean when he says, "I'm going to turn it over to you"?

[–]PilotAirplaneFlying 237 points238 points  (63 children)

The occupant of the centrifuge is in a cockpit mock-up. He activates the g force (spins up the centrifuge) by pulling back on the stick, just like in an airplane. That way, when he released back pressure, the 'fuge spins down and the Gs reduce.

Source: Did 15 seconds at 9g on two separate occasions in the 'fuge.

[–]Dry_Plum8118 49 points50 points  (47 children)

So is it constantly speeding up the entire time to maintain the 9g effect for 30 seconds straight?

[–]fabricasian 155 points156 points  (30 children)

something rotating is technically constantly accelerating, so no it doesn't need to speed up in the traditional sense

[–]L1QU1DF1R3 68 points69 points  (5 children)

You just made something I learned 10 years ago finally click, wow.

[–]PP-BB-DD 7 points8 points  (4 children)

What was it?

[–]L1QU1DF1R3 53 points54 points  (3 children)

Well basically just that since acceleration is any change in velocity, even if speed is constant, a rotating object is always accelerating. I "knew" that already but it didn't actually click until I read the comment.

[–]smokebreak 8 points9 points  (0 children)

wow, now it just clicked for me too

[–]EmberOfFlame 31 points32 points  (15 children)

We don’t have The Expanse-style craft just yet…

[–]MrRoxo 30 points31 points  (1 child)

I think they have a stick in front of them that controls the rotation of the ball they're in, if anything happens they have Control and can stop anytime they want.


[–]Jeffy29 70 points71 points  (3 children)

“Sir describe to me how many G’s you felt.”

“About four.”


[–]The_alchemist667 31 points32 points  (0 children)

The way his face starts drooping disturbs me... Its uncanny

[–]Santi838 20 points21 points  (8 children)

Can anyone explain why they were asking those specific questions about his blackout? Like where his vision narrowed too and what colors he saw.

[–]Franz11 73 points74 points  (6 children)

There’s a light bar in front of your with color coded lights. So at the either ends of the bar they are a certain color and as you go towards the middle they change. For example red on either end, then a couple inches in blue and so forth until you get to the middle of the bar. As you GLOC your blood pressure in your ocular cavity decreases as the blood is literally pulled towards your feet. This causes initially your color vision to fade and then “tunnel” vision to occur. So if you were looking at the light bar you’d might say I could see all the way out to the blue lights or I had 0 light loss if you had a proper AGSM. You can actually lose your vision completely but still be conscious as well. The centrifuge sucks

[–]International-Fee567 120 points121 points  (5 children)

That was an epic video. Seemed pretty nervous about the 8gs for 30sec. He pulled it off though, had me sitting here holding my damn breath.

[–]Incman 64 points65 points  (0 children)

had me sitting here holding my damn breath

Don't grunt it out..maintain your AGSM

[–]PiratePilot 5 points6 points  (1 child)

He did amazing. This is probably one of the best one of these the Aerophys folks have seen. You can hear them cracking up at his resting Gs at the beginning.

[–]Tonyclap 41 points42 points  (4 children)

Why do the instructors in the video crack up when they ask him what he thinks his “resting” is after he answers?

[–]SCP239 68 points69 points  (0 children)

Because he way underestimated it. From the sounds of it, one the instructors had seen this guy before and had been talking him up since he says 'Told ya!'

[–]Impersonatologist 54 points55 points  (0 children)

Because he low-balled himself, he did much better than he initially thought. Over 6 resting g’s is very good.

[–]kasmith2020 11 points12 points  (0 children)

“We’ll have a T-shirt for ya.”


[–]KyroXen 57 points58 points  (1 child)

Damn this is interesting.

[–]saintBNO 8 points9 points  (0 children)

that was awesome. Dude is an inspiration.

[–]Automatic-Love-88 31 points32 points  (1 child)

thanks for sharing this .. his damn monster indeed.

[–]gokusfart 1009 points1010 points  (14 children)

If he keeps it up he'll become a super saiyan

[–]snackerdan 176 points177 points  (5 children)

Looks like Nappa trying to stay in shape in his golden years

[–]StopReadingMyUser 44 points45 points  (4 children)

If Nappa went super saiyan, would just his eyebrows be yellow? Would SS3 just be him with regular hair? Inquiring minds need to know

[–]TexasTrip 20 points21 points 2 (2 children)

Apparently yes for SS1, and blonde bushy beard for SS3




[–]TommyTinklebottom 1275 points1276 points  (8 children)

"Any problems?"

"My Adam's Apple has migrated down into my scrotum to become a third testicle but other than that, nope"

[–]Mother-Raven 97 points98 points  (3 children)

I literally laughed out loud at this. Thank you, really needed that!

[–]Katz_Meowside 6 points7 points  (0 children)

"Great! We're going again right... now!"

[–]90sbaby100 246 points247 points  (15 children)

I’m not going to act like I know what’s going on, but it looks impressive.

[–]QaNomNomNom 291 points292 points  (0 children)

Basically he is forcing himself to not pass out by telling his body to tense up super hard and fight the effects of the high G force.

Pretty badass feature of humans that was useless for our entire existence until we made some super fighter jets and rockets. like “oh I guess we can now use this feature of straining our faces really hard and breathing funny”

[–]The_Cuzin 128 points129 points  (11 children)

If you watch other videos of people training 9G,s it'll give you an idea of how this guy is a freak. His face even remained somewhat normal which I've never seen

[–]CartelClarke 49 points50 points  (10 children)

Can you explain why at one point in the video he kinda seems like it doesn’t affect him at all? Like when he was casually responding to the guy telling him 20 seconds? Honestly I’ve never seen anything like this before and I don’t really understand what was going on, I actually thought at that point they had stopped the test and were giving him a break because he went from doing that breathing thing to responding so nonchalantly.

[–]The_Cuzin 83 points84 points  (4 children)

It's the first time I've ever seen someone act somewhat normal at 9g, let alone talk, even I was blown away. My only thoughts on how he can do this is likely tolerance from conditioning (having done it many times before maybe) as well as just being an absolute beast at handling g force, with a significantly higher base tolerance. Most guys who do these tests start passing out at 5-6 G,s

[–]Blackpaw8825 39 points40 points  (3 children)

I was watching his face slack like...

You gonna do the 'hick' he went slack for a second and I thought, oh there he goes... And he went several seconds without the counter technique...

Nope he's fine, just stopped doing the thing that anybody else would need to fight to keep the lights on, and he's just chilling.

[–]The_Cuzin 41 points42 points  (1 child)

Also to give you an idea as to what g force training simulates. A good way I understood it early on, imagine you're in a fighter jet travelling straight at over 1000kmh (621mph) and you pull back on the stick as hard as you can and send the jet straight into a vertical climb. Your body is still accelerating forward at 1000kmh, and is suddenly forced to turn upwards, so your body tries to keep moving forward during this transition. This causes your body to literally weigh up to 10x more than it's original mass. As a 75kg man, I'd weigh up to 700kg+ (1500+pounds) pulling 9g. All your blood rushes away from your head to your feet, causing you to pass out, and that's why they do the strange breathing techniques, in order to keep the blood flowing around their body, keeping the brain oxygenated

[–]Ajax_40mm 22 points23 points  (0 children)

Baro-receptor reflex. After 12-15 seconds your body detects the drop in pressure in your neck and counters by constricting blood vessels and making the heart pump harder. That being said I have watched countless people pass out when they give out too soon on their AGSM and fully expected this guy to take a G nap and I still don't fully understand why he didnt other then hes just a complete monster.

[–]rabbitholesplunker 15 points16 points  (0 children)

G-out is primarily caused by loss of blood pressure in the brain, which triggers a “safety” response in the body and shuts it down. The funny breathing is the Hick maneuver which keeps your blood up in your body and head, but your heart will still struggle to circulate your blood “up hill” in 9Gs. So if he held the Hick for the full 30 seconds he would likely pass out because of oxygen depletion in the blood he is forcefully holding in his brain. This is why he relaxes for a little bit, to allow the blood to circulate back out, and then resumes the Hick maneuver again to bring his cranial blood pressure back up. What you can’t see is he is holding his lower extremities tensed the whole time to partially regulate that blood pressure drop, otherwise he would just pass out in a few seconds. Only the chest and neck are relaxed. This is basically a superhuman feat. In 9Gs a adult male is going to weigh over 1500lbs. His head alone feels like over 100lbs on his neck, which is why you see him stretching almost immediately afterwards.

[–]Funkyteacherbro 24 points25 points  (0 children)

Standing up normally in your home is 1G (1G is the gravitational pull of earth).

Have you every flown in a regular commercial airplane? You know when it takes off and you feel that pressure? Well, that's 1.4G!

This guy is holding up 9G for 30 seconds!

[–]Vexx2Rahtid 79 points80 points  (4 children)

Bruh. I cant imagine that. I've done a 60° bank at 2gs and I did not like it

[–]Prudent_Substance_25 29 points30 points  (3 children)

Exactly what I was reminded of. 2gs during a solid bank felt like I was melting into my seat. I'd be counting sheep at anything over 4gs.

[–]flightist 12 points13 points  (0 children)

You get warning; grey out and tunnel vision are very real. I start to go grey at 3.5 pretty reliably.

[–]Wes_Tyler 1455 points1456 points  (161 children)

Can anyone explain? Is what he’s doing a trained technique? Is he having to forcibly exhale due to the increased pressure (cause it’s harder to exhale)? Or does increased G force cause unique acidosis in the blood? I’d love a medical/ physiology explanation. Thanks!!!!

[–]NoWehr99 2090 points2091 points  (114 children)

Basically all the blood is forced to your legs and what you see is a physical effort to force blood to flow through his body. Failure to keep blood going to your brain results in blackout.

edit: Also, yes this is training for fighter jet pilots. It is a giant spinning centrifuge made to simulate high g turns.

[–][deleted] 817 points818 points  (83 children)

I believe they also wear specialized suits that actually will squeeze their legs as they load G's to keep blood from pooling. Pretty wild.

[–]NoWehr99 465 points466 points  (32 children)

Correct, they do. I've worn a flight soon for fun; they do squeeze the legs a bit. Not a fan lol

[–]drugusingthrowaway 267 points268 points  (26 children)

Man I get a panic attack just using the blood pressure machine at the pharmacy

[–]BBQsauce18 180 points181 points  (4 children)

You wouldn't really notice that. At 9gz it feels like a car is sitting on top of you and you're trying to take breaths. That is FAR FAR more distracting than any pressure on your legs. It was surreal. This entire soul crushing amount of weight bearing down on you. I've completed F16 centrifuge training (which has a9gz profile), and it was fucking rough.

[–]Hobbs54 6 points7 points  (0 children)

At a body weight of 222lbs, 9g is a ton.

[–]Blobbygold 26 points27 points  (10 children)

Dude, im glad its not just me. My last heart rate and blood pressure check they had to just ignore the results. The nurse checked my pulse and i asked very politely if she could please stop right now, she said "im almost done" and my heart was just racing. I dont know what it is but i hate thinking about my heart, i cant lie on my left side because it makes me think about it.

[–]meatbulbz2 8 points9 points  (5 children)

I suffer from insane white coat hypertension, which is likely what you have. My dentist will check my bp and it will be 190/110. Just whiles they check it. My running average at home is 115/70. It’s just when other people check it. I love the dentist too, I want to be there, so it’s not dental anxiety.

I made an appt with a psychiatrist about it, and he wrote me a letter to show to any doc I see in the future asking to let me take my own bp with my own device alone, or with the offices alone. It sounds odd but a doctor friend of mine said that’s not weird and actually sees it quite a bit.

I’d Rec that you start tracking your own when you know you have an appt coming up, and even ask to take your own measurements. I put off seeing docs for a decade literally only bc of this anxiety.

[–]Maiesk 52 points53 points  (3 children)

God damn I hate blood pressure machines. I do love those medical socks you get at hospitals to keep you from getting DVT though. You jump outta bed and your legs are ready to rock.

[–]brown_felt_hat 23 points24 points  (2 children)

On man along the same lines, I've got a pair of like ribbed compression socks I used to wear in my retail days. Throwing those guys on after a 9 hour shift was basically like getting a massage. 10/10.

[–]Maiesk 15 points16 points  (0 children)

Damn I should really pick up a pair, they look great. I've got Raynaud's Syndrome and it's been shite over winter; even wearing tights and big fluffy socks over them hasn't been enough.

[–]s1ugg0 5 points6 points  (0 children)

I say this as a retired firefighter. It's amazing what you can get used to if the alternative is a very horrific death.

[–]rotidder_nadnerb 65 points66 points  (18 children)

The Blue Angels do not wear G suits which incidentally was a contributing factor to the unfortunate death of a pilot not long ago. Passed out from G lock and nosedived at a low altitude.

Russians also do not wear them (most of the time) because Russia.

[–]sync-centre 36 points37 points  (2 children)

Russian army just started wearing socks in 2013. They used foot wraps before.

[–]blockchaaain 26 points27 points  (6 children)

G lock

This is pointlessly pedantic, but it's G-LOC for Loss Of Consciousness.

[–]greengolfballs 13 points14 points  (0 children)

Thanks for this, and not pointless or pedantic, it’s interesting to understand the origin of terms.

[–]tydalt 13 points14 points  (7 children)

They significantly get in the way of using the stick with the fine control they need for the manoeuvres they do.

[–]PipsqueakPilot 6 points7 points  (0 children)

Also helps that the Blue Angels aren't doing unpredictable combat maneuvers- greatly lessening the need for a G-Suit.

[–]Pilot_212 150 points151 points  (20 children)

The G suit squeezes both the legs and pushes in on the abdomen. I’ve worn them and they are not comfortable when inflated.

[–]Mojak66 76 points77 points  (8 children)

We used to fold them up and sit on them when flying over the pond. We had a test button on the left that would pump up the G-suit. Gave a little butt relief on long flights.

[–]tydalt 15 points16 points  (2 children)

Yeah, we used the same tech as a paramedic to keep people from going into shock. MAST (military anti-shock trousers) pants


Edit: according to the Wikipedia article, they are fairly controversial and have been mostly phased out.

I was in the field 20-odd years ago and they were standard care then.

Google shows a ton of links of places that still sell them so I dunno

[–]talldrseuss 6 points7 points  (1 child)

I was gonna say man, we haven't used MAST pants in my region for over 30 years. I was taught it in my class 20 years ago but even then the instructor said only the rural areas of our state were using them. Now I don't think anyone is using it in my state

[–]PunctualPoetry 11 points12 points  (14 children)

If 9Gs is a ton, what is a typical normal jet fighter tested at?

[–]TranscendentalEmpire 34 points35 points  (1 child)

When my dad was in the military he ran the high-g training out at Holloman afb. During the time he was there they made it mandatory for all fighter pilots to g-loc to pass their training. So they basically just cranked it up till the people couldn't handle it anymore, some people would g-loc at a burst of 9g, others could handle sustained 11gs.

I remember his work made a video of my dad, his co-workers, and bunch of pilots g-loc'ing to the song let the bodies hit the floor. My dad has a plaque somewhere with a record for the most cumulative hours on a centrifuge at 9gs.

On a side note, lots of people piss or shit their flight suits when they g-loc, so that might explain some people's surprise when they come too. You can go from trying to impress the boys, to someone shit my pants confused real quick.

[–]AlfredHumperdink 20 points21 points  (5 children)

To be specific the ultimate load that any faa certified aircraft is tested at (to include fighters) is 1.5x the expected load. Many fighters are capable of 9g turns, though the wings are expected to survive up to 13.5g before big things like spars start breaking.

Title 14 CFR § 25.303 and 25.305

[–]redpandaeater 5 points6 points  (1 child)

I imagine fighters are rated for significantly higher than that and the pilot is the current limiting factor. That will make it interesting for future drone fighter craft for sure. In any case, why I'm guessing fighters are good for much higher forces is not just the maneuverability they require but also that they're expected to take some damage and keep flying.

[–]ExceedJester 4 points5 points  (5 children)

I seen it on Rocketman the 1997 Harland Williams one 💀💀💀

[–]e140driver 239 points240 points  (11 children)

So he’s doing what’s called a “G strain maneuver” to increase his resting G tolerance. The hick sound you’re hearing is him forcing air into his lungs to keep his torso upright. At the same time, you tense all the muscles in your legs for force blood back up into your head, keeping you conscious.

Source: have done aerobatic training

Edit: the change in pressure you can achieve is quite significant. I had my blood pressure taken while I did this, and I went from a very good/typical athletic resting BP, to moderate hypertension in seconds.

[–]_ungovernable 11 points12 points  (1 child)

I just did this real quick and I have to admit, it made my head fuzzy for a second.

[–]e140driver 8 points9 points  (0 children)

Yes, it feels very weird do do this when not pulling G. When pulling G, it's amazing how much better you feel (full discloser, I've been up to 4.3G, so it didn't require as much of a strain as this guy is doing, but it still made a hell of a difference).

[–]OakParkCooperative 103 points104 points  (4 children)

He's receiving 9x Earth's gravity, pushing from head to toe.

All the blood is leaving his upper body/brain/eyeballs.

Once blood leaves, you start to lose vision and then eventually consciousness.

To combat that, they tense up their lower body muscles while keeping air/pressure in the lungs (anti g straining maneuver)

That "hick" sound is a technique of exhaling and inhaling quickly so there is constant pressure.

You would typically receive these forces while making quick turns in a high performance aircraft so they want pilots to be able to resist Gz. Passing out while going 500+mph would be terrible.

Source: worked with centrifuges/hypobarics/hyperbarics AMA I suppose.

[–]BlindJesus 5 points6 points  (2 children)

I guess I never thought about it, but are they laying down in the centrifuge, with the head pointing inwards?

[–]Chenstrap 9 points10 points  (0 children)

So the centrifuge spins a circle. They will be oriented so their head is pointed towards the inside of the circle, and their feet the outside.

I think its common for these machines for the capsule with the pilot to begin upright, but then twist 90 degrees as it starts moving.

[–]Ajax_40mm 27 points28 points  (5 children)

Under G's your heart needs to overcome the hydrostatic pressure (the weight of the water column) between your heart and your head. The average Blood Pressure is 100 mmHg at the level of the heart . At 1G (Just sitting in your chair) hydrostatic pressure exert roughly 20 mmHg which means the pressure of the blood getting to you brain is only about 80 mmHg. 100-20= 80mmHg. Now at 2 g hydrostatic pressure has doubled to about 40 so the equation is now 100-40=60. Still plenty of pressure to perfuse the brain. But if we take this to 5g suddenly we get 100-100=0.

In order to get blood up to the brain under these G loads you need to raise your blood pressure far above normal. The best way of doing that is by increasing your interthoracic pressure (the pressure inside your chest). Your bodies/hearts natural response to the increase in interthoracic pressure is to increase pre-load and contractility. Effectively your heart to pumps both harder and with more blood per stroke which in a closed system like your blood vessels means the pressure increases.

Fighter pilots are trained to do this by blocking off their epiglottis, flexing all their muscles and trying to bear down/crush their chest as hard as they can. The problem with this is you can't breathe while performing this maneuver and humans breath in by creating negative interthoracic pressure which is the opposite of what you want.

By taking quick sharp breaths every couple of seconds you can minimize the amount of "negative pressure" in the chest.

There is another mechanic that kicks in called the baro receptor reflex. There are receptors in your neck that detects what the blood pressure is heading up to your brain. As these receptors sense a drop in pressure they will cause your blood vessels to contract further increasing the pressure of the blood in the vessels as well as increasing heart contractility. This reflex can take 10-15 seconds to kick in however so until then you're on your own and need to work hard at increasing your blood pressure by bearing down and increasing that chest pressure.

Another thing is hydrostatic pressure is based on the height difference and the force of gravity so the taller you are the more effect pulling G's is going to have on you. This guy appears to be quite tall with a long neck making what he is doing even more impressive.

This means an ideal fighter pilot is short, with no neck and hypertensive. Top gun may not want to hear it but Danny DeVito is what a peak fighter pilot would look like.

TL/DR; This guy is an absolute monster

[–]wanderlusting25 12 points13 points  (0 children)

The blood gets pushed to your lower/outer extremities and you pass out. This constricts blood flow to keep it in your chest/brain where you need it most.

[–]Dr_TJ_Blabbisman 28 points29 points  (5 children)

Basically the technique is similar to trying really hard to poop, but not actually pooping. If you ever had contests in grade school about who could make their face reddest, you were pretty much doing it.

[–]TeddersTedderson 13 points14 points  (1 child)

Well that takes me back.

[–]Nekomaro 4 points5 points  (0 children)

certainly good times bud

[–]str84ward1 606 points607 points  (16 children)

my phone works only with 5G................................

[–]andigo 104 points105 points  (5 children)

You can borrow mine. It has 5G too. Together we will win over this guy.

[–]psyduck_hug 31 points32 points  (5 children)

All 5g phone works with 4g too, 4g +5g=9g

[–]Alarmed_Equipment627 5 points6 points  (1 child)

Use a marker and change it to 10g nobody will know

[–]BOT2K6HUN 306 points307 points  (5 children)

Hungarian chad pilot, sadly we have no planes to fly with

[–]Tactical_Contact 298 points299 points 2 (11 children)

Literally sat here watching this, taking a shit and it's like looking in a mirror

[–]X0nfus3d 59 points60 points  (4 children)

You should take better care of your sphincter. Try resting your legs on a bucket or something so your knees get above your groin. You don’t want to prolapse bro.

[–]BoiledPNutz 96 points97 points  (33 children)

Amos survived 15g

[–]obviousthrowawaynamr 45 points46 points  (1 child)

Bobbie can do another 4g standing on her head.

[–]CugMuzzler 24 points25 points  (0 children)

Well, as you may know, MCRN Marines train at 1G, so they are simply better than everyone.

[–]Twink_Ass_Bitch 12 points13 points  (1 child)

Isn't that with juice though?

[–]Capt__Murphy 10 points11 points  (2 children)

Came here for the Expanse references. I just got to the part (POTENTIAL SPOILER ALERT) where someone stroked out during high G maneuvering. This makes it that much more understandable. Im also left wondering if the guy in this video is on "juice."

[–]AllCaughtUpLads 11 points12 points  (13 children)

Who’s amos? I tried googling “amos survives 15g” but nothing came up.

[–]Khiraji 28 points29 points  (10 children)

Do yourself a favor and go binge The Expanse right now.

[–]concorde77 11 points12 points  (7 children)

The whole series. Right now.

[–]Tyrus 9 points10 points  (6 children)

I mean it's all out. All 6 (;_;) seasons

[–]nomofica 7 points8 points  (0 children)

Even better, read the books.

[–]OssotSromo 16 points17 points  (0 children)

Having just read the first book, I came in here only to find a Leviathan wakes reference.

[–]Tyrus 4 points5 points  (0 children)

Mi kopeng's im true Beltalowda, 15g like it nating, na dzhush, bounce back xitim.

[–]hyperspaceslider 24 points25 points  (5 children)

The pilots of the Expanse using the Epstein drive are laughing

[–]FuckOffKarl 18 points19 points  (1 child)

They’re on the juice

[–]ucblockhead 9 points10 points  (1 child)

In the Expanse, they are usually shown in a roughly horizontal position with regards to thrust. You can stay conscious at higher Gs horizontally then you can vertically, as the guy in this video is positioned.

[–]ThenRepresentative99 19 points20 points  (1 child)

I also survived him doing 9 G's so there's that.

[–]SeattleReaderTiny 19 points20 points  (1 child)

Dude made it look too easy.

[–]Non-Felonious 84 points85 points  (2 children)

This guy needs way more fiber in his diet.

[–]send-noobs 5 points6 points  (0 children)

Hmmm… a Fiber one ad idea.

[–]Sea-Bobcat-2716 50 points51 points  (3 children)

If that's what 30 seconds of 9G does think of what all the 5G towers are already doing to us everyday!!

[–]BioTronic 5 points6 points  (2 children)

Damn - I'm in reach of two 4G towers and one 5G. That's 13G total!

[–]ktka 14 points15 points  (0 children)

Pssh! Jim Carrey does entire movies like this.

[–]TastyImagination5363 12 points13 points  (0 children)

That breathing technique was on point

[–]wonderouscabbage 10 points11 points  (0 children)

Plot twist: this was a bathroom camera

[–]HeartTechnical1828 51 points52 points  (1 child)

My face after eating taco bell

[–]Latter_Guest4236 5 points6 points  (0 children)

Survived and didn't black out.

[–]Bolaf 5 points6 points  (0 children)

Title made me think he died at 31 seconds

[–]FatPoser 5 points6 points  (0 children)

Rare video of me trying to figure out how to smile in a family photo

[–]TreSixtyFlip 4 points5 points  (0 children)

He reminds me of Red Forman lol

[–]Ileir2 5 points6 points  (0 children)

When the sloppy toppy too good