Nasty flying knee KO from the olympics
Man I started soccer at 5 and martial arts at 5. I swear to God I've take more viscious shots on the University Soccer team than when I boxed. At least when you're boxing, fighting, and just training you expect the shots to come and you can try to avoid it.
I remember when I was like 12 one time on a traveling team. Kid in front of me had the ball and he was super slow, so I thought I could run behind him and jump over his head... lol I busted that kid up pretty bad. Coach was pissed.