> smartphones in which the objects on the screen roll around and bounce back like you’re spinning the Wheel of Fortune. What I don't understand about this 'bou

> smartphones in which the objects on the screen roll around and bounce back like you’re spinning the Wheel of Fortune. What I don't understand about this 'bounce back' feature is that here in Australia we have software based poker machines (Vegas style slot machines to the yanks out there) and they have had this bounce feature for decades. Edit: To help people visualise, what I mean is the reels of the poker machine spin in one direction and when they finally stop spinning they do a very short bounce back in the other direction.