Last year I broke two fingers on my left hand taking a bad fall during jujutsu practice. I got some minor injuries over the years (ribs, nose, a list of bruises too long to write), but that was the worst, and totally self-inflicted.
I also broke my upper front teeth four times when I was kid. First time, falling face-first from my bike. Second time, being headbutted by another kid playing soccer (unwillingly: we were jumping at the same time to hit the ball). Third time, hitting face-first a closed door while running in dark (ouch). Fourth time, biting into some hard chocolate. It didn't even hurt, all I could think was "oh no, not again!"