Exchange
From JuggleWiki
The pattern is 423 with an extra '3':
[edit] 4233
To see this trick for its parts, this is one possible form:
One ball is always a '4' Column at the side, like doing Two In One Hand.
The other two balls are doing an Inverted Shower pattern.
Practice that part first, and then add the Column toss.
The form common for presentation is more like this:
The basic action is the same as Machine, with a high Carry for the '2'.
With this one, the high hand stays up there, moving very fast all the time.
To make it into 'Pendulum Drop', keep that elbow high, and swing that hand back and forth.
Here is a variation from George Gilson's book Beyond the Cascade that changes where the '4' goes:
See how much of a square Box you can make it into:
The direct way to do this pattern on both sides is to add a '3' to make the pattern odd-period:
[edit] 42333
The height of the '4' will determine the speed you will have to maintain or how high the Carry.
Another way is to make the '4' into a '5' and use:
[edit] 52233
Getting your hand from the high drop back down in time to catch the '5' will be a problem.
Both of the '3's are paired with a '2', suggesting another Carry, so
your may try to add an Under-arm toss below the Carry, and make the '5' an Over:
If you want to try this rather silly variation, here is a training drill for the silly part:

