They Call Me Trinity

Trinity, a lazy, ne'er-do-well gunfighter with unnaturally fast drawing ability and marksmanship, is dragged on a travois by his horse to a way station and restaurant. There, he encounters a pair of bounty hunters with an injured Mexican prisoner. Trinity calmly takes the Mexican away from the two men, killing them before they can shoot him in the back. The pair reach a small town, where they witness the local sheriff, a large, burly man with a similarly fast drawing ability to Trinity, gunning down three men after they harass him for not allowing one of their criminal friends to be released.