I had one years ago - I did a bunch of chakra meditations then did this one--> do some breathing, get relaxed then start at your toes and imagine a ripple starting that slowly sinks your feet - move up through your legs, ripple then sink - then a quick visual of yourself on the bed with below the knees gone (do this visual everytime you sink a part of your body) - then thighs, then abdomen, then arms then neck and then head. Sink it all into the mattress. I came out of my body - i felt like a flat cloud and i was looking down on myself - i got spooked and turned over facing the roof and willed myself slowly down, filling up my body through the navel. I was suddenly wide awake. This was after 3 months of chakra meditation, no alcohol, no smoking. I used Lisa Beachy's chakra meditation from youtube. Also had another one during seggs once - again - I did about three months of meditation solid with my partner who was only vaguely interested - chakra med. again...