I looked down and saw most of the skin hanging off from the bottom of my left kneecap to about 4 inches down and 3-4 inches wide in a construction accident involving gang nails. I bled all over the place and tied it off with an old beach towel for a few hours until we took a break for lunch. Then when I went to get it stitched up they tried to shave the hair off of the skin that was hanging off my leg but ended up just ripping the skin off instead.
After that I went back to work.