I prefer to call it an 'idiot cut' and yes I did get one, not to bad once.
I was in the woods plinking in the middle of summer, it was 97 degrees and I was sweating like a pig (being British I have frightfully thick blood) and my Winchester Model 70 .30-06 fricking slipped through my hands and the scope hit me in the fore head. It was very very stupid. Funny, but stupid.
I didn't leave a permenant mark, it faded after a couple of days.
I do have a big scar above my left eye from being hit my a flying rounders bat (think baseball bat but shorter and about the same weight) but that's another story where someone else was an idiot.