Duel is a 1971 film directed by Steven Spielberg. David Mann, milquetoast businessman, is driving across the Californian desert in his underpowered car when he passes a slow-moving semi-truck. Much to his surprise, the truck proceeds to pass him and slow down again. This repeats a number of times, and finally David pulls over into a gas station to get away from the truck. Except that it stops with him. As the movie progresses, the truck continues to stalk David, getting more and more violent in its attacks, until David has no choice but to fight back.