Worst physical injuries

When I was 8 and lived in Mexico I used to ride my bike around the neighborhood. One day, in typical Mexican fashion, my bike turned up missing and I borrowed my cousin's bike. My cousin is left handed and reversed the brake levers on the handlebars. Let's just say that I didn't know how heavy I really was until I hit the concrete face first after flying off that bike. I lost 3 teeth and I dislocated my shoulder, which I hear is far more painful than breaking your bones. I've never had a broken bone, so I don't know if that's accurate.

After that I was cautious as hell. Then in middle school here in the states some gangster kid I mouthed off to (bad fucking idea, by the way) pulled a knife on me and tried to stick me in the shoulder. He missed, but he ended up cutting open a nice long gash instead. Last time I heard of that guy he was dead... Ironically enough, he was shanked while in juvenile hall. :/

Jam it back in, in the dark.