I've experimented on and off with this concept for about 15years and I have had some pretty strange experiences. On more than one occasion I experienced a strong full body tingling and what I would describe as the point of separation, because it feels like my awareness of the world around me becomes heightened. but I always get excited and ruin it. There has also been a couple of times where I woke up from a dream in this heightened state, but like before, it doesn't go anywhere. I like to think that I had near projection experiences, but even after these, I'm not sure what they were.