Quoted from Nokoro:Sorry for the dumb question, but how does one practice by playing one handed? Do you use one hand and move back and forth between the flippers, or do you just have one hand on one flipper and try to nudge to keep the ball away from the other flipper?
Pick a hand and go back and forth between flipping either one. I put my left hand in my belt loop behind me so it stays there. When we play dollar games in Kansas City the extra balls are always played one-handed and I've seen some pretty crazy ones. It's fun and educational.