I had a fragment off steel slit my chin open. Yuk. Another time, a little lead snow flake particle landed on my tongue while I was talking behind the line -
I've seen a rifle round from across the range come back and crack someone hard in the noggin. Another bounced off the tin roof of the sun shade.
As far as eye protection - I've decided always to wear glasses - no lasik or corrected cataract implants so I don't have to wear them. I was mowing the lawn and a rock I never saw in the grass socked me hard in the mouth.