"You don't play pinball just with your hands, you play it with your groin too. The pinball problem is not to stop the ball before it's swallowed by the mouth at the bottom, or to kick it back to midfield like a halfback. The problem is to make it stay up where the lighted targets are more numerous and have it bounce from one to another, wandering, confused, delirious, but still a free agent. And you achieve this not by jolting the ball but by transmitting vibrations to the case, the frame, but gently, so the machine won't catch on and say Tilt. You can do it only with the groin, or with a play of the hips that makes the groin not so much bump, as slither, keeping you on this side of an orgasm."
Umberto Eco: Foucault's Pendulum(Great Britain: Martin Secker and Warburg, 1989), p. 222.