and the marine takes off running low and bent over , and he scrambles over the road and into the ditch , and he puts his head up and then waves at you to come and you sort of hop up and stagger a little and then take three very slow steps across the hot blacktop and sort of fall into the ditch , and you look over to your left and see the marine crouching up and he looks at you and says same thing again and you bring your m-16 up over the lip of the ridge and then you see the top of a head and you pull the trigger and the rifle fires and you see little dust clouds all over the wall , and then you stop firing and there is silence again .