Ritual body Postures, & Ecstatic trance Options

Greetings

Just wondering if anyone here is familiar with the body postures as discovered by Felicitas Goodman. She published her story and experiences in a fantastic book, called "Where the Spirits Ride the Wind".

If it isn't familiar to you, here's some good info:
http://www.ritualbodypostures.com/discovery.html

But if it is, and you've explored the spirit-world in this way, I would like this to be an opportunity to share stories and experiences of the "alternate reality".

Thanks
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I'm familiar with Goodman's work. I've read her book twice and copied out the illustrations. Her thesis is that certain postures cause altered states of consciousness. She came upon a number of statues and carvings in archeology that showed common postures. I'd have to pull out my files to recall the exact postures. But while yogic postures aren't claimed to have the power to alter one's consciousness, they are similar in a way. In Qigong, there are postures and movements to increase your energy flow. There are also mudras or hand positions to change your energy flow or frequency. It isn't so radical when you think of it thuis way.