I think everyone's probably had some sort of scary moment (or actual injury) while working around running props. My only injury ever was sustained by reaching through the edge of the prop disc of an idling Magnum .40GP.
I was crouching in front of the plane and had just started the engine. The glow clip was slowly working it's way around to the front, thanks to engine vibes. So, without engaging my brain properly, I thought to myself "I'll just grab that before the wires get into the prop......"
Next thing I knew, the engine had stopped, there was blood sprayed everywhere and I had a couple of decent lacerations on the meaty part of my hand, just below my right thumb. Too messy to stitch 'cause the prop hit several times and tore the area up nicely, so they put a couple of those suture (sp?) strips on and bandaged me up.
I've got a funny, crescent shaped scar to show for it, but thankfully that's all