I dreamed that I got a new laptop I've been saving for. 
When I woke up I was like, hey wait where's my laptop? It took me a while to realize I had a dream
I hate those dreams. I've noticed that two classes of dreams are the most realistic and detailed for me: the first class are dreams where I get something that I had been wanting for a long time. When I wake up, I become acutely aware that it was only a dream and life still sucks.
The second is sex dreams. Those are the best dreams ever. Especially when it's a dream about someone that isn't your girlfriend. Because it's not technically cheating, and they are always super detailed and awesome.
This sounds a bit more out there than my previous posts, but as accurately as I can describe it, one of the times I tried salvia and had the revolving door through dimensions effect, I tried to pull myself out of it and "find" the correct universe where I belonged, unsuccessfully I might add. It was like I was leaving each universe in layers, zooming out more and more (I was reminded of the Dilbert animated series intro video) until I was actually at the outmost layer, when the "real" world/universe/dimension was at the center. This could have been a sense of reincarnation, or an out of body experience, but I couldn't put my finger on it at the time, it was like my soul was passing through several different versions of my own body, each one appearing identical but each felt radically different and somehow wrong.
In comment to the first highlighted part, it doesn't seem out there to me at all, lol. But then again I have been there and experienced the same thing you have. I like how you said "as accurately as I can describe it". I'll say that often too. When you experience something so profound that it is beyond words and true comprehension, you often have to explain it in ways that cannot possibly encompass the true experience. In response to the second highlighted part - this is what I was talking about earlier. You get a strong sensation of being outside of the universe and observing it for what it is. I myself had the perception that human life was a cosmic joke, and that from this vantage point it was so clear that the struggles and triumphs of our lives were ultimately meaningless compared to the bigger picture of the universe. It is interesting that when stripped of the ego it is so easy to accept this realization.
It is fitting that you brought up salvia in a thread about dreams, as I often describe the experience as a sensation of "waking up" to a higher or more true reality. It literally felt as if my entire life as a human being had been nothing more than a dream compared to what I was observing at that moment. And there was a strong sense of familiarity about it. Like I had returned to a place that I had visited before I was born.
I imagine this sensation stems from the fact that you are fully conscious but experiencing a reality so vastly different from the one you were in just a moment earlier. The brain is wired to interpret what it perceives as being primarily true and accurate. I think that is why these experiences are so profound. But just because it stems from altered neurochemistry doesn't make the experience any less profound or the knowledge gained from it any less insightful.
Just like the knowledge gained from dreams. No big surprise there, since both dreams and entheogenic experiences stem ultimately from altered neurochemistry and are influenced by the ego/subconscious.
