I have five:
- My left upper wrist (the size of a marble) and a crescent-shaped slit on my lower lip -- I fell on the ice when I was like 12. I was delivering newspapers with a friend, in the winter. I had my hands in my pockets while walking on ice. I slipped, since my hands were in my pockets I didn't have time to recover, so my face smacked into concrete, covered with ice. I also chipped a tooth and was bleeding considerably. The most painful experience of my life.
- My right thumb (looks somewhat like a crooked + sign or swastika) -- Was trying to pry something open with a big knife, my hand slipped.
- My left thumb -- No idea. It's pretty small, though. Probably just another accident with a knife.
- My right knee -- About 6 months ago, I was running across a street. My back heel slipped off of a curb as I was crossing it, I then dove forward, landing on my knees first, and then scraping my palms against the street. I didn't need stitches, but was extremely sore for several days.
I learned a lesson in caution from all of this: All of it pretty much just happened because of carelessness.
Oh, and one more thing: This isn't a scar exactly, but it's sort of like one. When I was a child, maybe 7 or 8, I was using one of those manual pencil sharpeners... Like the above, my hand slipped and I accidentally stabbed my left palm. The tip of the pencil also broke off. The wound healed with the pencil lead still inside. It's been there for almost 20 years now. The spot has faded a bit as I've grown, but it's still there.