I never get why we have to overblow this.
Do you know, I drove home last night and have no memory of doing so? Automatic pilot, driven by my brain, while I thought of "higher" things.
I changed gear, negotiated roundabouts, kept to speed limits, stopped for pedestrians and red lights and navigated home without giving it a single conscious thought.
I also know that every night I fall unconscious, hallucinate vividly and then have complete amnesia about the whole event if I'm not interrupted before my brain is finished with it. It's called dreaming.
If I was sitting in a room for six years trying to do something, my brain would hallucinate the same (that's not meant to be an insulting word, it's quite literally what imagination and dreaming are) and believe I was outside my body. Yet, nobody, ever, in any controlled experiment, even when saying they ARE in that "special place" has ever demonstrated knowledge of, say, what's on top of the dresser behind them that they couldn't see from inside their body, or similar. You can even awake completely relaxed, unstressed, energised, without even having an hour's rest if you've had the right dream.
In the same way as out-of-body near-death experiences and suchlike, attributing it to some other existence seems, to me, to be entirely insulting to the capacity of the human mind under normal circumstances.
We have composers who see colours, artists who can paint pictures that don't complete until the final brush stroke but they can see it in their head in vivid detail, and story-writers who live in their heads most of their lives even if they can't write it down to save their life.
When the brain is then deprived of sensory information, and forced to entertain itself, it's no wonder that such experiences happen. To push them to "something else" rather than "Woah, my brain is capable of stupendous feats" is, I feel, condescending.
It doesn't require a supernatural explanation, or even comment. We've probably all done more amazing things in our sleep, or driving home from work.
Hell, I dreamed a "movie" from start to finish in twenty minutes of being asleep one night and still, to this day, I like to fold back into that dream or even write it down (which has taken YEARS of my life to do so). My brain was on-form that night, and I awoke exhilarated and haven't forgotten that experienced in 20+ years.
I really find it annoying when people then - as you just did - write it off as supernatural and, having "mastered" it in what sounds like a repeatable way, then ignore it and never do it again for fear of... what? Discovering some truth? Angering some god?
What if that's the way to escape the Matrix? What if that's the way to gain insight from your own mind on things nobody else has ever managed? What if that is the way to Heaven/Hell or whatever?
As someone of a scientific mind (can't you tell?), it drives me mad that people get near the equivalent of the next level of human existence, then never repeat it, wrap it in crap like "astral projection" and meditation, and basically forget it ever happened.
If it made you not fear death, surely you could do it again and be less scared, and not fear dying in the process?
But, maybe that would then conflict if - actually - it turns out just to have been a particularly vivid dream?