Not so much a joke but rather a concept question:A plane is standing on a runway that can move (some sort of band conveyer). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in opposite direction).
Winning an argument on the internet is like winning the Special Olympics: You may have won but you are still retarded.