This is a truly awful story, so if you are at all squeamish, STOP READING NOW! When I was at school, we had a sports area that had a few bike racks in it - the sort that are just a single metal arch that you lean the bike against and can also be used to swing from if you are a child and lift up your legs. They are also just about low enough to jump over, which a friend of mine tried to do one afternoon during a sports practice. He made the foolish mistake of trying to go lengthwise over the thing and, badly misjudging how far he had to jump, landed on top of if with his legs on either side. As a boy, this was obviously extremely painful. After the initial agony, he seemed to recover and we got on with teasing him about it.
With the sports practice over, we went in to change and then back to classes. But my friend did not turn up for his next class. We told the teacher, a search was started and he was eventually found in the bathrooms. As we found out later, what had happened was:
As he was changing after sports, he had decided to go to the bathroom. He had gone into a stall and pulled down his pants and underwear. However, the impact of the collision with the bike rack had burst his scrotum. As he pulled down his underwear, his testicles fell out and sort of dangled there. He fainted. I’m happy to say that, as terrible as that sounds, it was apparently just a matter of stitching his scrotum back up and he was fine a surprisingly short amount of time later.