Worst injury

Mine haven't been that bad. I used to play hockey, when i was in like 2nd grade. And I was defense and i was going to get the puck against the boards, now, it all happened so fast, I can't remember how it happened. I either got checked from behind, or I slipped on the puck. And i fell into the board a weird way. And my collar bone was fractured, the x-ray looked really cool, it was like a broken twig completely facing opposite directions. Yea, but the weird thing is, being like 7, i still didn't even know what happened until like five minutes after it happened and i realized i couldn't use my left arm. My second one would have to be I was sitting on my pinball maching(black hole, pretty sweet one) and we had a big exercise ball, and I got off the machine, and stepped on the ball and fell back and cracked my head open on a giant knut jutting out of it.