nothing as serious as yours, but me and a friend were throwing a ball back and forth while we were walking up some stairs. Me first walking backwards up and my friend a small distance behind me. My friend threw the ball a bit too high and I walked, still backwards, up the stairs to try and catch it, thought I was at the top(I wasn't), turned around and smashed my face in the railing. half my front tooth fell out, but not before it pierced my lip. I had to glue that part on again.
another funny related to that story is that me and some friends were hanging out. I had bought some candy. I think it's called "drumstick"(I'm not sure how to explain the consistency of the candy, but its kinda resilient, hard to bite through). I bit in this and tried to pull off some. I didn't actually manage to pull any off, so i turned to my friends and said something. I don't think I've seen anyone laugh as hard as they were doing, ever. I hadn't realized that half my tooth was now stuck in the drumstick and I was looking like an idiot.
oh, and that time i was cycling home from school and I decided to bounce my front wheel right and left repeatedly.
Yep, that didn't go very well. I fell of my bike and my bottom rib hit the edge of the handlebar. I now have a scar to remind me of my stupidity in the shape of the Nike logo.
And of course the time i was cycling home from school and there was a spider hanging from my handlebar. It was making its way down to the ground and I saw it when it was right beside my front wheel....
yes, I had the brilliant idea that I should try to get it away with my foot. Probably my stupidest idea ever. My foot got caught in the front wheel and I went over the handlebar and on the ground. My foot hurt for months, or rather, my big toe.