The Fake Columns is a variation
of Columns (or more accurately the Two-in-one) in which one outer ball is
moved by hand along the same horizontal level as the other. This creates a
very cool effect, especially when used inside a normal Columns pattern.
To learn the trick, it is best to start out juggling a Two-in-one with column throws, with a third ball sitting in your non-dominant hand. As you are about to make an outside column throw, start moving your non-dominant hand along with the thrown ball, making sure to keep them level. Once the thrown ball has dropped back to your hand, continue with the Two-in-one pattern.
Use the regular Two-in-one part as a recovery period, and then do another fake. Keep practicing until you can do the Fake Columns constantly.