Explain what the top hand should do at contact
Both hands ulnar deviate into and through impact. The phase of ulnar deviation of the top hand is generally behind that of ulnar deviation of the bottom hand. The top hand/arm, which is serving more like a 'throw' (a side-arm throw), will 'roll' (i.e., rear forearm will pronate) towards the end of its ulnar deviation. That is the movement of 'educated hands'.
Why does it look like a push to extension from the top hand/arm? You see contact at the classic power v, and then it seems the top hand pushes to extension.
Because of all of this slo-mo "analyzation" makes things look different than they really are in real life or at full speed...as does looking at still picks, and then making instructional theories based off of that as I've seen done in the past that is even worse than the slo-mo stuff.Why does it look like a push to extension from the top hand/arm? You see contact at the classic power v, and then it seems the top hand pushes to extension.