I think you're onto it. This seems to be the same punching technique Chuck Lidell uses, by leading inward and pushing his shoulder before his fist, he creates that "whipping" effect you spoke of.
I don't see why one couldn't use a verticle fist in this manner if the blow is not and overhand/ downward hook. If it was delivered to the body, a vert. fist could be used.
Calling yourself "Master" implies that you have slaves.