jose, when i get around to it i'll post a video of my friend who is pretty good at taiji but as a physical therapist he knows how to play w/ people's nervous system's pretty good. he can tap me on my chest w/ his palm and then tap me again w/ the back of his palm and my feet come off the ground. it reminds me of when the doctor taps your knee.
so what i mean by defying physics is that how could a force that is much less than my weight (his hand tapping) get my feet to lift off the ground. surely that would not work on a statue.
maybe i could help NickC's example. once i tried to open my fridge while on the phone. i had my glasses on and was looking at the door handle past the lens. there must've been some kind of parallax involved cuz i missed the handle and landed on my ass. this was actually one of the taiji "a ha!" moments for me.