the marine lifts up over the back end and fires again and then you crawl over to him and say i cant remember how it works and he looks at you like you really suck and he takes the rifle from you and pulls back the charging rod and hands it to you and says you need to fire back and you need to fire at that little fort over there and then you need to get the fucking radio out of the back and hand it to me and you crawl back to the front and lift up over the hood saying holy fuck holy fuck and you see the little fort and you aim at a window , and when you pull the trigger you see a head pop out at the bottom of the window , and your m-16 rattles like a stick in a can and your bullets fly and they sail downstream and they hit that head and it turns red and the sill turns red and the head slides down out of sight .