Before learning this trick, I suggest that you learn to One-up Two-up. One-up Two-up is basically the same trick, but it's easier because you don't have to worry about how high you throw the balls as much, therefore there are fewer accidental collisions. Juggle Two Balls in One Hand - Columns. The other hand carries a ball in over the top of the inside ball. Try to follow it as exactly as possible. It should look like the bottom ball is attached to the top by a string.