When a stupid driver is so hung up on driving fast and passing cars instead of thinking, that they pass a car and then cut them off while trying to exit the highway.
You're driving, and the car behind you races out to make a pass. They quickly come back into your lane after overtaking you (most likely without signaling) and continue to exit on an offramp. Basically the tool of a driver should have not even bothered trying to make a pass. The correct response is to lay on the horn and yell at them, "NICE FAG-SWIPE FAG!"