I was shooting my beloved GP100 with 125 grain copper plated bullets running at around 1400 fps. After one particular shot, I felt like I'd been slapped in the face and shoulder. At first I thought it was just the sound wave being harsher than normal. Then the person I was shooting with said, "Oh crap, you're bleeding."
Sure enough, had a little blood coming down from a new little wound in my cheek. I realized I had a similar but smaller wound about an inch below that, and a red mark an inch below that one, and a small little open wound on my shoulder. They were all in a kind of line.
I thought now might be a good time to see if my revolver was going out of time and sure enough, on some chambers, the cylinder wasn't lining up completely before the hammer fell. So I must have shaved a plated bullet and the fragment zapped me. Went to the doc on Monday to get it checked out, and all is fine.
Couple of lessons learned. First, don't go near a shooting range without safety glasses, because you never know. I had glasses on, and always do, but it's still a reminder. Second lesson is, it's a darn good idea to check the timing on a revolver before shooting it.