I just posted about this in "chi" under Chinese Med. forum.
I had a truly amazing experience. Without the practitioner touching me, I had a sense of turbulence around my head & where the "third eye" is located an intense sensation of sensitivity that seemed to encompass both pleasure & pain.
I'm a highly skeptical person & didn't expect squat. And I don't think there was any hypnotic suggestion, unless the person hypnotized me into forgetting that they made such a suggestion!
The practitioner explained after that the turbulent sensation showed that my polarities were unbalanced, and the forehead sensation was my "third eye" chakra trying to open ( and I had a milder sense of this third eye opening at odd times for a week or two).
It's made me open to the idea that chi/ki/prana/life force is for real if not scientifically proven (yet!)