I work on a Navy Small Arms range. Typically we will get all of our gear setup while its still dark, and then sit around drinking coffee/ checking email/etc. while we wait for the sun to come up.
The pits we shoot into have a mound about 50 yards in front of the to conceal acoustic targeting systems, pop-ups, and the like.
I wasn't actually on the range this day, but i hear the story over and over again.
One day we were testing Anti-material rifles. We were shooting at stacks of spaced steel and aluminum plates, with a 6' x 6' backer, The sun came up, we verified the dope on the rifle from the previous day, and had the RSO turn on the red light. My colleague got behind the rifle, took aim and missed the plates with a .50 APIT, but did manage to hit the backer, fllowed by a gigantic puff of feathers from behind the target.
I don't think that turkey was expecting to get hit by a .50, at 1000 yards, first thing in the morning...