I must have a knack for this kind of thing because I really doubt that puncturing a fingernail is a common type of injury. I’ve done it twice in my life now. Once when I was young (I touched a power saw that had not stopped spinning). Apparently yesterday was not exciting enough for me. I was attempting a minor repair when the board split as I was trying to screw it in place and the drill punctured my middle fingernail with a screwdriver bit. I’m really curious to see how this will heal.