Thanks for the comments guys.
Brian, there are many karate folks that have a hard time imagining that series of techniques as anything other than a block, a block and a block. Part of the reason I did the video was just to remind people that the techniques can be understood in different ways. About the empty chambered hand. In the portion of the form I was showing it progresses from down block to rising knife hand then to a high block. You could pull something back with the chambering hand, or continue by stepping forward with a series of high blocks / strikes.
Jim, you make a good point about having the uke be more menacing or threatening. I agree with your assessment about the openings. When I show techniques from forms or basics I like for the examples to have the movements look just like the kata. That way people don't have to make such leap. Two of the ideas I wanted to show my guys again were, Blocks as strikes... the wrap up for a block as the block itself. One other thing I'm looking at is if your response to someone grabbing your wrist or arm is fast enough your waist twist can destabilize their balance enough keep them from getting a solid punch off.
btw, yes Jim that is me.
If you are interested there are more at...http://www.youtube.com/user/PrairieMartialArts