I was at the grinder/wire wheel and noticed my chin was itchy and I knew I hadn't shaved for a couple of days so no big deal. After I was done with the process, I decided to clean up and go to lunch. I noticed when I wiped under my chin, it felt painful so I went to the mirror and noticed a piece of wire wheel sticking through my scruffy growth. No problem, just pull it out and sanitize it. Found out in the emergency room that it was a whole strand that just missed the muscles that control the toung. Doc said I was lucky right after he asked if I had my safety glasses on. Hhmmmm......I didn't have the heart to reply that those glasses were not going to do a bit of good on my chin.