The stuff that I found amazing was how truely devastating a .50 cal round is from a long distance.
Some of those ground attacks were from long distance and/or medium altitude and the amount of crap thrown up on the ground strikes was incredible ... also the popping of the locomotive engines ... not as thick as armor, but not light weight by any stretch ... like a hot knife thru butter.
Anybody who questions the potency of a .50 cal round in the game, needs to look at these films.