The Reverse Crossunder is, as
it sounds, a time reversed variation of the Crossunder. Instead of crossing
your arms to throw the balls, you cross your arms to catch them. That's
basically all there is to it. Before attempting the Reverse Crossunder it
is important that you already be very comfortable juggling the Columns pattern
with either hand catching the middle ball. You do not need to already know the Crossunder
To begin learning the Reverse Crossunder, start with one ball in each hand. Simultaneously make a vertical throw from each hand and then, as the balls peak and begin to descend, cross your arms and catch each ball with the hand that didn't throw it.
Practice this using both arm configurations. To add in the third ball, start with two balls in your dominant hand and one ball in your non-dominant hand. Make a pair of simultaneous vertical throws and then, as those balls peak and begin to descend, throw the third ball vertically along the center of your body and cross your arms. Catch the two vertical balls and then uncross your arms while catching the center ball with the hand that was crossed under your other hand.
Practice this on both sides. You have just completed one full cycle of the Reverse Crossunder. To run the full pattern, just make another pair of vertical throws and remember to cross your arms in the opposite configuration when catching the balls. The Reverse Crossunder is, like the Crossunder, a fairly easy yet fun variation of Columns that is great for beginners.