I had a 12" "china hat" grinding disc go 1/2" into my knee while fabricating my winch bumper. I had 4 inside stitches and 8 on the outside. The disc completley cotorized the cut so it never bled, and It actually didnt really hurt. Luckily It missed muscle tissue so it just went through skin and fat. No serious damage, just a cool scar.
I have stitches in my face right now. Good ol' bmx accident.