Wow nobody realizes this is Astral projection?
Amazing how nobody explains that this is the actual start of Astral Projection and none of what the sleeper experiences is ANYTHING but what they project into Consciousness with them. It is a very strange documentary in that it never goes into the darkness to show what it actually is equals a positive aspect of Conscious ascension = Astral Projection. After being a lucid dreamer and astral projector for 40 years I understand what sleep paralysis is.
It is the body going into a "low energy" mode while the Spirit travels. This is done so the body does not accidentally move or hurt itself while the sleeper is expanding Consciousness in the astral dimension. The paralysis happens when the Spirit has not exactly slotted back into the physical body 100% and thus the blurring line between physical and astral dimensions become clouded.