Learn this after you learn how to do two balls in one hand. In this trick, you throw 2 in 1 hand columns in one hand, and in the other, you never throw the ball at all. Instead, you move it up and down, syncronized with a ball that you are juggling in the other hand (2 in one hand columns). If you figure this out from my descriptions, it'll look like you are lifting a barbell weight with one hand.
Confused? Watch the video to clear up how you do this trick. It should work, unless too many people are watching it at once. If that's the case the whole site should shut down soon... You should be able to get the general idea.
