I'm going to be running a horror game for a few of my friends. I remembered that there used to be a thread on these boards that had some really interesting (scary) ideas for little details to create atmosphere and build up the tension. Sadly, I can't seem to find it now.

Please, if anyone could give me a link back to the thread, or to similar threads on this or some other board, or if you could chip in with some ideas of your own, that would be a big help. Thank you.

I've already decided the basic plot of the game. The original pitch was something like "what if there were mutants like in X-men in a WoD-like setting"- 'Mutant: the Aberration'... or something like that. The idea came from one of my friends' observation that the Marvel Universe is already a rather dark and depressing place and if you took out all the sillier stuff it could be quite horrible. As soon as I heard that I decided that I HAD to run that game.

Anyway, the plotline I have in mind is: a group of friends go on holiday to a seaside town. It starts off really nice and sunny but things gradually get strange, dark and surreal. The town shifts and changes around. People disappear and nobody but the PCs seem to notice. Monsters start to appear; they're people that have been twisted into bizarre new forms. And the town gets stranger and stranger until it's almost like Mirrormask or something. Obviously there's a simple explanation- the town is at the mercy of an utterly insane Reality Warper. The PCs have some resistance to his powers because they have psychic powers of their own.

I just need some ideas for weird (horrific?) things to happen to build up the atmosphere and show how the town descends into madness and horror.

Can anyone help?