"Scissor" religious thing, I'm tripped out.?

ok, I'm in highschool, and I used to go to church on a weekly basis. I realized that I was extremely confused by Christianity, and religion in general. I stopped attending church, and through my friends I've heard some funky stories like "getting scissored." Supposedly, it's a black figure that pins you down, and the only way to get out is by praying to god. Like some kind of faith test, and you're completely mute and immobilized. I just had this dream, maybe it was real or not, but I'm trippin out extremely hard. I was indeed immobilized, could not move my arm, body, leg. I also could not hear myself yell for it to get off of me (with swearing of course).
I just wanted to know, if anybody has experienced this. Or knows more information. Please, and thank you.