When you're fucking someone in a field and just as they get off you throw them onto an electrical fence and scream "There can be only one!" Also works by throwing an electrified appliance into the bathtub or shower during climax.
Hot girl with big tits: "Oh my God Travis I'm gonna fucking cum! What the...?"
*shoved into electrical fence, zapped to high hell via The Highlander method*
Travis: "THERE CAN BE ONLY ONE!" *sings Queen's Highlander Theme*