People are saying it's scary how this works, but I'm really not sure that's the right word for it. Don't get me wrong, I'm still skeptical, but as someone prone to sleep paralysis, sometimes with auditory hallucination, I haven't found that this causes either. On the contrary, although I think it's too soon to say, the results I've seen so far have left me feeling quite hopeful. I did have sleep paralysis the night I first used this, but it was hours after there video had ended, and like I said before, I'm prone to having it anyway.
My copy/pasted reply to a similar comment posted around the same time: sleep paralysis happens every time you go into REM sleep. It's an important feature -- otherwise you'd be kicking and flailing every time you dreamt about running. Thankfully, it's very rare to be dreaming AND awake at the same time... it's a weird experience for sure!
Porter S.