I have four perfectly parallel scars on my right ankle from when the back wheel of my bike hit a rock and I toppled over... the bike chain cut open my ankle.
Also, I can honestly say that I'm the only person I know who has scars because she was excited about going to the library. My city's library has these extra long steps (you know, the kind you can take a couple steps each on), so as a kid, they're amazingly fun to long-jump down. So I'm running down these stairs, jumping so that I only touch each step once... bam. Last step, I miss, fall flat on my face. Two scars on the top of my right hand. Oh yeah, my tomagachi went skittering away too, and when I picked him up, he was sick.
Jam it back in, in the dark.