I accidently screwed myself once and I can assure you that it wasn't any fun. Now that I have drawn you in
I was attaching a mail box to a post and the screwdriver slipped. The damn thing went right up my nose and scraped along the cartilage that runs down the middle. It was a bloody mess, but I could garner no sympathy from anyone because they would burst out laughing when I would tell them what happened.