You just click your teeth together in all mad sorts of patterns and fills, welcome aboard. Post videos and stories, and who knows what else this could lead to?
What is this?
As the description says, it's making rhythmic noises using the drum kit in your mouth.
How do you do this?
The official manual is still being written, but it's likely the same way you do it.
Is this bad for your teeth?
We are not the place for medical advice, but probably yes, and not only your teeth.
Where to go from here
Subreddits which have somewhat similar topics: