Once while working in oilfields, I was walking back to the area in a gas plant where we were working, having a discussion with another worker and ran smack dab into a steel beam. Didn’t see it with the baseball cap I had on blocking my vision. Hit me right across the top of my forehead and knocked me on the ground. Several weeks of ribbing ensued after that.
I was sharpening a plane blade and had it sharp enough to shave the hair off my arm. I was using oil stones, and the blade was slippery with oil, so sure enough I dropped it. Working in a shop with a concrete floor I didn’t want to ruin the edge, so I stuck my foot out to stop it. I was wearing shorts at the time. The blade hit me mid shin and sliced its way down about 3 inches or so, then it hit the floor and dented the edge.