A push is no push unless it's ordinsry

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Note that Tom is going upward as well as going backward with the punch. In light of that, I would not bet any money make the stereotype remark and say this is a "push".  If it was a push then Dr. Hwa would be pushed back by a reaction force. "Push" yourself back from the wall for yourselves and note the reaction. The reaction force from a push is a hallmark of ordinary force. The reaction force of ordinary force is also in accord with Newton's 3rd Law. You know this as every action having an equal and opposite reaction. He is doing a punch that uses 1/4 body internal discipline. There would be a reaction force if his punch did not adhere to the following path: Relax arm,  Tense arm, Relax the arm and he is able to do this because force comes from the core and not external (arms and legs). So, is his 1/4 body "punch" in violation of Newton's 3rd law or not?   There is logical and scientific reasoning at work here. In Classical Tai Chi We are doing Lion's share of repairing the hole where logical reasoning disappeared, "righting the ship" and saving Tai Chi.