Juggling so that one hand does every throw and every catch under the arm results in a cross-armed pattern, where one arm stays crossed over the other. It's easier to do a cross-armed pattern with outside throws than with inside throws, because the hand movements normally used for inside throws result in outside throws when the arms are crossed.
3 ball cross-armed cascade | Mills mess is an alternating cross-armed pattern - two throws of a cross-armed pattern (starting with an under the arm throw) are followed by an outside throw to transition to a cross-armed pattern on the other side. | 3 ball cross-armed cascade with inside throws |
4 ball cross-armed asynch fountain | 4 ball cross-armed synch fountain | 5 ball cross-armed cascade |