Hypnagogia: an unexplored universe?

A question that has been on my mind is what is hypnagogia and is it really all in our heads? The other night I had a hypnagogic vision of a demon, it was so real that it scared me half to death. Think about this: Humans have been seeing these visions forever; what if someone a long time ago saw a vision of a demonic creature of some kind, compared notes with other people about these visions and then came up with the Christian cosmology? So in that case hell would be real because they saw it, so too heaven and all the different religious inspired 'planes' of existence' people say they are real because they've been there, in this sense and were able to return and talk about it. So that means that some how or another humans didn't create hell, hell was there and they just described it. I'm not trying to jump into some crazy religious boat but I think this form of speculation does come up.
Another thing that I discovered today is take a look at this fractals - Google Search
That's the Google images of fractals. For me when I look at those I see pictures that i've only ever seen in hypnogogic visions. These are one moment where in a Hypnogogic vision they all flow together but that's the only place i've ever seen such complexity, such use of color and design. Does anyone have some kind of take on this, wacky coincidence or something more significant? It's all pretty weird to me. But thanks for any input.

Hi, i cant really answer to your question but yes there is something to that visions. At least i think they are different from the dreams. I have lots of that stuff going on before i fall asleep and sometimes its quite weird. I have also seen some strange demonic faces and similar but sometimes cities from different places/times. May be if one can concentrate on one of these vision one can visit the corresponding place? I dunno but for sure the visions are cool :) Btw fractal thingies are a common for people consuming shroomies :) Very intense colors and crazy forms :)