 FAKE: At the airfield, while Roger is filling up the helicopter, a  zombie climbs over some crates to get him. As he gets to the top,  the blades of the helicopter chop off the top of his head. This  causes blood to ooze out of the top of his head and down his body.  The pump tube for the fake blood can be seen coming from up behind  the crates and up the zombies pant leg.