This rhythm comes directly from regular 7 clubs popcorn, but it is not so usual with eight clubs, though quite easy to manage. In theory, each juggler throws:
8 clubs, 4-count popcorn : <5 3 5p 3 |
5 3 5p 3>
When you practice, you realize it's easier to replace triples (passes and selfs) with doubles (as you would do with 7 clubs popcorn). It's a little faster and lower, but not so ugly to look at.