A pool ball can indeed come off a cushion faster than it hits it, primarily due to the effects of spin. When sufficient backspin or sidespin is applied, the ball can rebound with increased speed, as its forward momentum converts into backward momentum upon impact with the cushion. This phenomenon is supported by the principles of kinetic energy, where the energy from the ball's spin contributes to its translational speed after the collision. The discussion highlights that while some energy is lost to friction, the conversion of rotational energy can lead to a faster exit speed. Overall, the interaction between spin and cushion impact allows for this seemingly counterintuitive outcome in billiards.