Hilarious! Well, I have a scar just above my nose and between my eyes all because of my 1973 Z1-900!
How did I do this? Well, I got my Craftsman open box wrench out to tighten those two very thin nuts that hold the center stand and its bolts to the frame. I was lying down with my face too close to the center stand and the box wrench slipped off one of the two thin nuts onto ... my face.