I think being a writer has made you pay a lot of coigniscance to these feeling, events happening as well that definitely takes place that a lot of people definitely do not know about.
I think sometimes when the mind is unbalanced and the psyche is troubled these blackouts, seeing shadow people, hallucinating or thinking of evil things according to one's physical predicaments.
I have never had these issues, maybe being a meth patient or suffering from dementia, but all I know is that the Mind is very creative most times being mentally unsettling maybe about previous experience that's happened in one's life can unravel a whole lot.

Beautiful write-up here I love it.