I don't know what it's called or how to actually trigger it, but there's some infinite falling glitch in Skyward Sword. Since you don't lose hearts from falling from the Sky, if where you fell causes you to respawn over the Sky, you'll just keep falling over and over and you are forced to reset the game since there is no way out of it. Either way, I think it's hilarious, though I was super confused the first time I had it happened to me.
This is the only footage I have of it, if you don't know what I'm talking about. Not that this video really helps at all.