One student who was a bit clumsy where I train accidentally broke one of the big mirrors. There was glass all over. He and a few seniors went to clean it up.
The student who broke the mirror felt really bad about breaking the big mirror, and started to sweep it up. As he was sweeping crouched over, he sat directly on a piece of mirror which was pointing out of the mats.
He jumped very high.
Everyone chuckles about that one now because its finally been long enough.