Yeah, I was nice and moved it back to the other side of the room, each time in a little bit different place.  After he worked his way back to the ball, he had to get behind it so he could knock it forward with his crazy-hard dick.  The last time I put the ball next to the wall so he had some extra maneuvering to do with it.  He only enjoyed this 3 times - we were going out later and didn't have loads of time.