I think it is a mind set. I was behind a very small burm. A bad guy was shooting at everything. If it moved, the bad guy shot a 5-10 round burst. I was reloading, thinking of how many rounds I had left, how long was the day, when was the last time I cleaned my rifle, etc... . The guy next to me, gave me a very reflective look and said, "I thought we were the only ones that were supposed to waste ammo."
Oh yeah. I was combat comedy at its finest. I laughed my butt off. It was a “Willey and Joe moment.”