Sure, horror movies are scary. But have you ever watched a cult documentary? Sometimes, ghosts, zombies, and monsters aren't nearly as horrifying as humans. IDK about you, but it's pretty freaky to see people succeed in psychologically manipulating others (and sometimes themselves) into believing a cause or concept that seems totally illogical. The extreme lengths some blind followers are willing to go for their leader and/or community is unnerving. It's the subtle and disturbing kind of horror that creeps up on you. But it's also so fascinating that it's hard to look away.