I'm going to have the thread moved soon , an oversight on my part has it in the wrong forum. But the idea is that there are isolated incidents of all kinds, but nothing happens where there are a lot of people to see. Even when something happens most people wont believe the story..
But that leaves room for all kinds of nasties , ghosts, monsters anything really.
It's peoples fears that give shape to what comes for em , like a corporeal nightmare. Say if a person who's afraid of water wanders out one night and finds himself lost in the fog. He may suddenly have something drag him into a puddle and he'd be found ( or not found) with water in his lungs. A person scared of ghosts or something , may see things and die of fright.
As the story takes shape there will be more direction I'm sure , but for now its pretty vague.