I found your mention of "body-twitching" interesting. I saw the video from the saltcube website about having lucid dreams and obe-s and it mentioned body twitching. The video said it put the body to sleep before the mind because it tricks the body into thinking it is asleep by acting like how it would while we are asleep. That doesn't really make sense to me, but that's what it said, and I wonder about how that connects with what you are talking about.