Technique of the week 2- slapping block

My camera has been acting up , so I've chased down the best youtube video I could for this technique.
Having assumed the basic stance discussed in technique of the week 1, a stundent can then begin to practice the slapping block or pk sau.
This instructor is good, he goes a little further into the offensive use of the pak than I would care to when building a system from the basic stance, but it's the best I can find. Once I've sorted my technical problems out, I'll throw up my own version of the pak, modified through kenpo.
Peace,
David