Any ideas how to troll a scammer with creepypasta?

Hi! I just got the idea that it would be fun to troll a scammer with some creepy or scary story. But I can't come up with the idea what it could be to seem real. I know that they react well on the scary stories and images but I need something more creative, for them to be scared to turn back when outiside at night. And if not creepypasta, would you have any idea how else could I troll them? I am on interpals and I am a woman, so I have at least 5 to 10 opportunities to troll someone in a day but I don't really know how to do it the fun way. Anyone?