When I was a little kid, I was running away from my dad, having a grand ol' time trying not to brush my teeth. I ended up closing the door in my house, only to have my dad actually kick it down. Too bad my left thumb was still on the doorknob. Doorknob + Wall x Thumb = Ouch. I actually lost half of my under nail and all of my over nail. (Yes there are actually 2 layers) It still hasn't grown back. =.=