Bone Dry (movie, 2007)

Eddie finds himself being forced at a gunpoint, by an unseen assailant, on a dark and brutal journey through the harsh terrain of the Mojave desert. His nemesis is Jimmy, a man with an aberrant agenda; armed with a rifle, a scope, walkie-talkies and a truck, he has organized a series of ambushes and mantraps designed to push Eddie to the limits of his humanity and beyond (iMDB)