I happen to have personally performed that experiment in 2014 and wrote about it on my blog, because it was horrific. There's no peace, love, or perfection in the state of unconsciousness when you're asleep. That's a god of the gaps argument, in any case, since ordinarily there could be no confirmation of what it's like to be unconscious. From what I could tell under the very unusual circumstances I experienced and wrote about, the comforting mystical hypothesis was quite falsified.

http://rantswithintheundeadgod.blogspot.ca/2014/01/awake-while-sleeping-dmt-and.html