A screenshot from "Duel" (1971). This was Steven Spielberg's first major film. The story is about a businessman traveling across the desert in southern California to get to a job interview. Out in the middle of nowhere, he gets stuck behind a semi-truck with an exhaust problem, and moving slowly. He passes it...it passes him...he passes it again, and it gives chase. In this scene the driver of the truck is trying to shove the main character into a train. The film inspired a number of rip-offs, many of them 'ghost vehicles' without actual drivers ("Christine", "The Car", "Killdozer", etc).
A contest between two individuals, no more, no less (er, obviously). Despite what Mr. Anonymous would have you think, it is not necessarily a battle to the death. A chess match could be considered a duel, as could a swordfight, or a naked mudwrestling contest (between women, of course. Naked men mudwrestling is a fucking crime against nature).
"I challenge you to a duel! Pick up your pugel stick! GLADIATORS, RRRRRREADY?"