theres different ways/techniques...
I think its (by memory)
contract abs, contract l or r elbow, extend neck, relax hand/grab.
something like that..not sure. I have no set sequence to explain.
Object of mod is to decap head, pass it back and forth as much times as can without it touching the ground. Try not to decap other parts of your body and keep it clean.
I hope it answered your question.