I found some kind of glitch while playing a GTA Flash clone called Cars Thief. I was riding on a motorcycle running over a dozen people when I did a funny bouncy cartwheel motorcycle stunt, hit an unbreakable fence and cause my motorcycle to stand up in a 90 degree angle.
So I got off and started falling through the world in an endless loop while the camera is spinning around back and forth.
I even found a red arrow from the compass HUD while I was still falling endlessly.
But yeah, this is a glitch that always make me laugh my ass off super duper hard. 😛