Chipping my front tooth when we went curling for gym class. I had never gone curling before, and the first time I did the sweeping thing--i fell flat on my face. My top right front tooth chipped off upward (more tooth in front then back). Bit my lip too--I was bleeding pretty bad from my lip and nose. I think my tooth and some of my blood is still frozen into the ice there. Had to have a root canal and everything after that. At least I looked like a tough hockey player for a day which all the chicks digged.
I once caught my thumb in a fold-up chair. I started laughing, and when I leaned back, I fell over. When I used my hand to catch myself, the chair folded up on my thumb. Very painful. And all of this was in the basement of a church during religious classes. Somehow, I didn't break any bones.