I occasionally have dreams in which I can fly. For me, it feels like it's just a matter of balancing correctly: I'm still affected by gravity the same as always; it's just that if I really concentrate, I can maintain a pose in which no part of me is touching the ground.
This is a kind of "X files" thread.
Post experiences which spooked you, which made you doubt reality, mathematical or physical laws, your sanity, memory or perception. The more improbable the better, but no second-hand legends please, share only what you personally experienced. If you had the event later explained rationally please use rot13 to avoid spoilers.