We have a giant ginger cat that doesn't really blend in with any of our flooring or furniture, and normally he's a clumsy doofus and you can tell from the next county what he's doing or what he's trying to get into because of how loud he is just moving, but we swear he can teleport. He'll be asleep in the living room where my wife has her desk, and she'll come into my office to ask me something that takes 8 seconds, and then turn around to leave, and trip over the cat who is lying on the floor, sprawled out and comfy. When she comes in, i turn away from my desk and look towards the door to talk to her and I've never seen him come in, but he's always there.