Horror story: your friend gets possessed, you get a group together to exorcise them, and then you ask them to prove they’re back and tell you something only they’d know. They answer with a hyper-specific, deeply uncomfortable, and completely untrue personal fact about you. Like a weird kink that you don’t even have, or some humilating and creepy story from your past that absolutely never happened. You can insist all you want that it’s the still the demon talking and it’s not true, but now everyone’s heard it, and it was delivered so convincingly, now everyone will just. Keep Thinking About It whenever they look at you. Yeah, it probably was the demon talking, but jeez, what a lie, right?