I can probably go through the whole scar collection. Some rather bad ones because someone doesn't like going to hospitals and did stupid shit when I was younger. Most have to do with the hands and wrists. But I do have a permanent scar smack center on my forehead because I busted my head open on a corner stanchion when I was a year and a half old.
Others would include, hey you shouldn't try to open a restaurant sized bottle of balsamic vinegar with a chef's knife ... oops found the bone right below the left thumb ... and continued to work and make pizzas that day.
Hey you shouldn't get really mad and take it out on the subway tiles in the bathroom at a restaurant and whoa ... now you have an extra knuckle on the right picky finger.
Hey don't get mad and punch a plate glass window with your right palm.
Among others.