Yesterday Batdancer gave me the idea for a trick: DoubleTap-back. By which, I don't mean two tap-backs in a row, I mean Tap-back, but with two taps in the same direction between the ball leaving and returning to the big cup. After seeing BD do this, I managed a [TripleTap]-back, and then 3 of those in a row. I'm sure a QuadTap-back must be possible too.