(out of body experience.)
I have had some success inducing experiences in other people using physical restriction, and sensory deprivation.
One one occasion, I was making a pattern for one of my slaves to get a leather hood. He was not restrained, but sat comfortably on the floor at my feet. This pattern making process involved first covering his entire head, except for the nostrils, in saran wrap, followed by layers of duct tape.
When I released him from the encasement, my slave reported that he had been so consumed by frustration at not being able to see me, as he felt me gently smoothing the tape onto his head, at one point he realized he was watching me from a point in the corner of the room, near the cieling. This realization snapped him back into his body.
Within the fetish scene, it is known that if a person is bound tightly immobilized, (Safely!) completely covered, and sensorally deprived, (blindfold, earplugs or white noise, tasteless gag) that is a fine recipe for astral travel.
A bound body goes through a series of pain stages, like sitting in a cramped airline seat, and then goes completely numb. The consciousness, completely starved for stimulation, will eventually, in desperation, break down the barriers of normal experience, and leap free of the body.
Particularly if the only stimulation after a period of time is a whispered suggestion to do so.
This method is certainly not for everybody. While I am an excellent guide, and Have had sucess inducing this state in others it not a method I myself am interested in attempting.
A good source of information on this method is a fascinating gentleman, known as Fakir Musafar, considered to be the guru of the Modern Primitives movement.
Now in his fifties, his account in the book, Modern Primitives, of how he managed to give himself this experience at the age of 16, is fascinating reading.-M.A.S.