Many many moons ago, when I was young and immortal, some friends & I played a game w/ an axe. Almost embarrassed about it. You hold a decent-sized wood-splitting axe at the bottom of the handle, elbow locked & using your wrist, s-l-o-w-l-y bring the edge of the axe to your own forehead & back up again. Only one mishap involving actual blood loss. A Miracle actually.
I won't even go into the stupid rugby antics.
You get older, you stop doing stupid stuff...