1. Back of neck. At a carbine glass sweating like crazy, a piece of brass got stuck under my shirt. Didn't notice the burn until it felt itchy a few days later at the office and I pulled off a big chunk of skin. 2. Upper arm. Doing "urban" or rollover prone drills, a buncha brass rolled down and got me good 3. Not sure if there is any scarring on the inside of my nostril. A .223 case at an indoor range bounced off the wall, off my stock (bad follow through i know) and up my nose. The heat seared the mucus and formed a strong bond, i shook my head to no effect. Had to yank it out with my hand. The scab made it hard to pick my nose for a week.