Hmm, skating behind the net in ice hockey to get some speed up and make a charge for the opposing net, someone made a slap shot for my goal. Don't try catching a slap shot with your teeth. Although, having a hockey scar in Canada gets me a lot of poon.
Either that or trying to hop a chain link fence in high school. One of the links was sticking out, and, as I jumped, I spun so I would land facing the fence. It was a high one and I wanted to see how many of the girls I had impressed. Well, only one of my legs came down. The other one was skewered on the fence. Being a tough guy, I calmly extricated myself and made my way to the school office. When my story made the rounds the next day, I impressed even more girls than I originally intended. Yeah, I do a lot of stupid stuff to impress girls and friends. Chicks dig scars, wounds heal, stories last forever.