There’s one thing that has stuck with me for more than a decade (probably). It was a very short youtube video. It was just a man and women in bed back to back. After a second it pans to the woman’s side of the bed and shes a scary looking monster demon lady. I think about it once or twice a week. Specifically when laying in bed with my lady and shes not facing me.I have no idea what its from. Youtube used to have alot of randomly terrifying content.
Honestly, Sphere (the book). On the surface it really appears to be standard Michael Crichton sci-fi/monster stuff, but when you realize what’s going on, the deeper the horror gets because it’s so much harder to face your fears when they physically manifest, especially in an already difficult environment.