In a Duel to the Death involving guns, two characters stand back to back, walk ten paces and then see who can draw the fastest. Except it doesn't usually go like that. One of them will a) leg it, b) fall into a pond c) duck or d) prove their cowardice by turning early and trying to shoot their opponent in the back. If it's a comedy, the person counting out the ten paces may just keep going, with the combatants ending up several miles apart.