Strange things happen sometimes!
When I was in ITR (now I think they call it AIT) quite a distance off they were detonating an artillery round with some C-4. When it blew, it sent a chunk way up the hill toward us, and the instructor screamed "incoming" and hit the dirt. It landed about ten feet from a group of us.
Vic...try carrying the M-60 in mountains, flooded paddies, and elephant grass when it's about 100 degrees!