Footage from Sangin, Afghanistan, recorded in 2010, shows US Marines returning fire after being attacked by a Taliban rifleman.

Initially, the Marines just fire at known or suspected enemy locations to suppress the fire, but soon begin working out the exact firing location of their attacker. They are able to identify muscle flashes emanating from a "murder hole" in the dome of a mud dwelling. They work mortars and machine gun fire onto the enemy's firing point, forcing him to retreat.

In my several years of watching and analyzing combat footage, you can always tell which online commenters haven't been in a firefight. They say things like "you can't even see the enemy" or "do they even know what they're shooting at?" In a Hollywood feature, the Taliban would be running out into the open with Ays blazing only to be cut down by the "good guys."

Your average Taliban fighter is as dumb as a goat turd, but even he knows better than to attack ISAf units from an easily identifiable fighting location. This one chose a "murder hole," basically just a hole in a wall, small enough to aim and fire through.