Wow. Confused, you're pretty dangerous xP
I haven't had many injuries myself. I managed to break a nerds glasses by punching him in the face though, the lense knocked clean out, didnt crack or anything. He deserved it, and I was only acting in self defense.
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When I first stood on a skateboard, I slipped and fell off, smacked straight into the ground.
Oh, and I fell off the half pipe. It was actually really funny, because I fell face first into the ground. My nose was fine, but the skin between my nose and mouth wasn't. I had a tiny, mustache shaped scab for ages... it was pretty funny.
And I managed to burn my school tie in Chemistry without getting told off. It wasn't my fault. I was trying to light my Bunsen burner, and I saw one lit over on another table. There were two on the table, the one furthest away was the one I saw, it was on safety so I spotted it easily, but the one near me wasn't, and I didn't notice it was on. I leaned over it, and lit my splint; went over to light my own bunsen, and only after it had been lit did I notice my tie. It wasn't on fire, thank god, but the fabric on the front was gone. o_o' Pretty scary to notice. I think I still have it now, I might upload a picture of it.
I've also had two encounters with a cricket ball (Yep, I'm English). Both involved my head, and were really ironic. First was in primary school. My nerdfriend (who was also the one whos glasses I broke) was 'having a bad day' he claimed. So, (I was good friends with him then) I went over to comfort him. "Don't worry, Fred." I said. "I've been having a bad day too." Right at that precise moment, the ball collided with my head, knocked me out for a second. Woke up on the floor, laughing. I don't know why I was laughing, because it hurt >_>
The other encounter happened during 'House Cricket' where we, in our school houses, play against each other. It sucked. I hate house competitions. But anyway, I'd just embarrassed myself by holding the bat the wrong way round and knocking my own wicket off. o_o I went back, red in the face, thinking, "It can't get much worse than this." I was staring at the ground. Mistake. Cricket ball hit me in the head. Didn't knock me out, but gave me an excuse to go home for the day. xD
Well, those are the only accidents I can think of at the moment... pretty rubbish, actually, I don't have many outstanding accidents. But hey, the less the better, I think... unless it comes to storytelling like this ._.