After a transport bus breaks down, Wheeler and Walker kill the driver and passengers — save for Stacia, who left previously.

Wheeler murders a woman (Laurene Landon) and hangs her body in the truck, and pistol whips and decapitates a man with the sliding door of the luggage compartment.

Stacia, sitting in the middle, slams on the brakes and sends the two murderers through the windshield onto the road and causes the truck's cab to fall on its side.

Walker attempts to strike a deal with Wheeler as he points out how much fun the two of them could have with an ambulance, revealing that he still has his craft knife he used to torture the stoner's girlfriend.

The new killer tells the driver that he plans to save Stacia (bound and gagged in an upper bunk of the ambulance) for later.