Thanks Dan, that makes sense, just wanted to clarify my mental image.
Ark had me do some similar stuff on him when I first met him in Tokyo. That was one of the "WTF?!?!" moments when he just stood there, square to me and had me just shove on him. All of my taijutsu stuff is telling me, "he's gonna be weak on this line" and yet all the physical sensation was that he was going to be nearly impossible to move.
We often do push testing integrated with our static postures work, so while someone is cycling through tenchijin or one of Neil's postures a partner will give pressure to various parts of the body and in different directions. Some angles are understandably easier to deal with than others, and if a push overcomes the testee, the tester backs off, lets them get stable again and tries it again.
The push-out has become one of my stock devices for convincing folks that what I'm working on really is different.