About twenty years ago, I was injured by accident and never fully healed. It was a very strange thing that happened. I was at the gym lifting weights. At the time, I was using a leg press machine. I was young and my legs were strong so I was pressing a lot of weight. I got up from the machine for just a moment to get a drink of water and a brief rest. When I returned, everything seemed normal. What I did not know was that someone changed the setting on the machine so that there was no weight. When I gave the machine a hard push thinking it would be heavy, I was startled to find that it was extremely light. The part of the machine that you push with your legs moved so fast because I pushed it so hard that before I could pull my legs back it hit me right in the shin. As a result, the piece of metal cut my legs and tore my skin. It hurt a lot, but no bone was broken, so I never saw a doctor and only covered the skin so it would heal. The skin healed but oddly the hair never grew back.