This reminds me of an experience I had once. I was lying in bed, it was about mid-day, listening to music. Suddenly I started to feel pins and needles all over my body and then felt my body disintegrate, as if I was just a "blob" of energy or something hovering in the air. Lastly, I could clearly hear every single instrument and note in the song I was listening to without trying, as if the different layers of the music were being deconstructed in real time. The experience felt kind of like a dream, because the more I evaluated or thought about it in my head the more it seemed to slip away - it was strongest when I just calmed down and experienced it without trying to think about it. Eventually my mind got the better of me and it stopped. I've never done drugs, but I imagine that this might be what some hallucinogenic experiences feel like (though to be honest I have no real idea).

I think a couple of things contributed to this weird state that I've never been able to reproduce again:

* This happened soon after my family relocated to the other side of the world and my sleep schedule was still a bit messed up.

* I was a teenager and at the time was going through a phase of interest in lucid dreaming, so I'd been keeping a dream journal and got to the point where I had really good dream recall. I think it also helped me stay conscious closer to the boundary between sleep and wakefulness (eg as opposed to just blacking out into sleep I would remain conscious during more of that transition process)

* I had been practising taking mid-day naps because I read that those might be the best time to induce a lucid dream. I wasn't trying to do this when this happened, but it _was_ somewhere around mid-day and I _was_ in bed, maybe my body just decided it was time for a nap and entered that state between sleep and wakefulness.

I wish I could make it happen again, but I've never been successful with inducing this.