Mystery of Zab's disco hands vs PBF solved!

You folks all remember in the 5th round when Zab began doing some crazy stuff with his hands?
None of us knew what to think of it. Lampey was clueless, Merchant was too at first, then he gave his opinion on the matter. Lewis also thought he knew what it is Zab was doing. They were all wrong and by George, I think I have solved the mystery.

Video:
http://www.viddler.com/SMFV1/videos/5/

I don't know what else to think.