Of course, they're not quite in the complex. Not yet. They're skirting the edge of the dead zone in a stolen hunter-chopper piloted by the man claiming to be a Marine. (A Marine. Seriously. One who was at Black Mesa and somehow managed to survive. Jesus Christ, is everyone batshit insane back in the States?)

The man in the yellow suit sits grimly in the rear compartment with the other three members of the infiltration team. He's trying not to show that he's nervous, but in trying he's making it even more obvious to a discerning observer.