Hmm, sorry, seems my mention of sleep paralysis might have moved things off on a tangent a bit. I wanted to draw the comparisons to the hallucinations I experience then - and the hallucinations do sometimes persist once the paralysis has worn off for me. I know it can be very frightening. especially if you've never experienced anything like it before.
I recall one experience when I woke, the paralysis was brief, but when I looked across to the other side of the bed to where my partner sleeps, he appeared to be sitting up in bed, looking at me, but I *knew* it wasn't him. It was like something was wearing his face. I sat up and reached across the bed, and my hand went right through it (because I was hallucinating). I clearly wasn't paralysed at that point though.
Even though I knew that what happened wasn't real, it left me feeling very shaken. You still have that visceral reaction to "seeing" something frightening.
Have you experienced much broken or disturbed sleep lately? Feeling extremely tired or exhausted? I know those factors can be triggers for me.
There is some interesting reading to be found on the subject here:
http://www.thesleepparalysisproject....eep-paralysis/
including documentaries and links to research conducted into sleep paralysis, hallucinations etc.
Ultimately, I won't denounce your personal beliefs and if that's how you choose to interpret what happened to you, there's not much I can do to convince you otherwise.