Still Life

Nathan, a lad in his teens, is driving alone through a winter landscape. His pill bottle is beside him; he pops a few. He's almost out of gas. He reaches a town, and while staring at someone sitting at a bus stop, he runs over someone. He gets out of the car: it seems to be a lifeless mannequin. He goes for help to a café; everyone's a mannequin, and when he looks away, they move their positions. He hears sirens. He runs home. What's he to do; is it a nightmare ?