This amazing rhythm was first revealed (at least I think so) in an article from Christophe Prechac: Symmetric Passing Patterns.
One juggler does crossing passes, while the other one does straight passes. All passes are singles (floaty singles, the siteswap value being 3.5).
The 5-club version may be considered a rhythm on its own (and surely is), but is a compulsory first step to the 6-club version. It will make it a lot easier for you to learn the double-zip thing that will allow you to catch a pass.
Explanation of the double-zip: when a pass is coming to your right hand (and similarly to your left hand), instead of freeing it with a usual self (3), you have to do a left hand double (4), followed by a right to left hand-across (1).
The 5-club rhythm is then:
double, zip, pass, hold, hold, and start again from the other hand. The hard part at the beginning is to know from which side you must throw the double.
WhyNot ? - 5 clubs: 3.5p 2 2 4 1
We're using the holds on the 5-club version to add the 6th club (check out
the diagrams: we've added another line instead of the 2s). The cycle becomes:
double, zip, pass, self, pass. If you can remember the pass-self-pass thing, which is a short 2-count, the 6-club rhythm feels natural once the 5-club one is mastered.
WhyNot ? - 6 clubs: 3.5p 3 3.5p 4 1
To start, the best is to have J1 starting with 4 clubs, and doing pass, self,
pass, double, zip. J2 starts half a beat later with the self double.
If you have 3 clubs each, J2 starts half a beat before J1 with a pass, then you do as if J1 had 4 clubs (as explained above).
The whynot can be seen as a four-hand siteswap: 86277