Make a momentary catch with the R hand. On the next throw to the R instead of catching it pop it off the R forearm back to the L hand and continue. The pop from the forearm comes from a very similar motion as that in the previous trick. This is the name given in the Encyclopedia of Ball Juggling for the 3 ball trick where all catches are made with your hands straight at your sides and you rotate your wrist inward so that it is next to your thigh and your fingers are pointing outward. Well, there's no reason you can't extend it to a 5 ball pattern.
Throws have to be very quick and very accurate.
The first throw is a 6 the second a 5. You actually have two in a hand at a time. The left also throws a shower throw but from the right side of the pattern under the R hand. The L hand then uncrosses and makes its catch in the normal spot. So all throws are from the R side of the body and all catches are on the L side.