Don't you feel a bit sorry for the students in this guy's school? The link takes you to a YouTube video showing a guy stopping his students in their tracks using his chi.
I see teachers like this and I think "just give me a shot, big guy." :) Let's see how strong your chi would be then.
Once, a guy told me that he could take a knife and by using qigong, he could try to cut himself with the knife and his skin wouldn't be cut. I said, "Give me the knife." That's when the excuses started--"Oh, I'm not at that level yet."
Like, whatever. :)
You see other "no touch knockout" guys like George Dillman always using that type of excuse. Usually it's the tired old, "It doesn't work on everyone," which is their way of saying it works--they have magical powers--but it doesn't work on someone who doesn't play along.
It's a shame the martial arts community doesn't rise up and hammer these guys for making the arts look so stupid.