Go ahead, relive the moment!
Mine is the whole knee injury deal. I landed wrong while doing a flip and dislocated my knee. The tendons on one side ripped off and broke the kneecap. Luckily, my knee went back into place because it hit the ground so hard, so I didn't have to put it back myself :)
Luckily though, the only bones I've ever broken are my kneecap (pretty bad), my fingers, and my nose... I never want to break a major bone!