I have no problems with the teachers demo, although I would question his assumptions
like most demos similar to this its not shown in a setting to see how he or his students would apply it.
I would say they'er setting themselves up for a bad ending.
although this is from a posting on his face book
"I have been learning many styles of Martial Art for well over 50 years now, including Judo, Tang Soo Do, Northern Shaolin Seven Star Praying Mantis, White Crane⋯⋯, Tan Tui, Tong Bei, etc. plus three different styles of Tai Chi Chuan (Tong, Yang and Cheng) for well over 25 years just on Tai Chi Chuan alone.
When I have touched hand with Sifu Liang for the first time, I could not utilize the skill that I have acquired at all, for when he touched my hand I could not attack nor withdraw. When he touched me lightly with his thumb on my stomach , the force went inside my body. Right at that moment I then asked Sifu to accept me as his disciple.
It's been 5 years now from that moment on and I can now perform some of his marvelous techniques with remarkable results on other Tai Chi Practitioners. I highly recommend Sifu Liang as an authentic Yang Shao Hou's style true Master. 更多"
https://www.facebook.com/LiangDeHuaTaiji/I make no comments as to the teachers skill.
Touching a hand and controlling it, and touching a fist coming towards ones face is not the same.
Getting hit in the face is a bad time to find out.
As to the OP question.
No I do not train the people I work with to react as they do.
In fact I ask them not to, they still react because they have too
There are sound physics principles that dictate the how and why of the reactions.