I never even got as far as the Mach III this morning. As I was going over my scalp with the Headblade one last time, my hand slipped or something and tore a chunk out of my crown. This is the worst nick/cut I have ever had in the almost five years that I've been shaving my head. Unbelievable that such a large amount of blood can come from such a small cut. I can't get the damn thing to stop bleeding. Every time I pull the tissue off, it opens up the wound again. I can't even leave for work until I can get it under control. Can't go out in public with a piece of tissue sticking to my head. This may be the last time I use the Headblade.