Scary stories sga style horror.

[thetruegoddess.livejournal.com]

So it's October and in honour of the season I'm looking for recommendations on the absolute best of the best scary sga fiction you have read. If you know of any fics that really really creeped or freaked you out please share them with me. I would prefer McShep stories because that's how I roll. Please no mpreg, and I would prefer longer stories but shorter ones are more than fine too. Zombies, vampires, werewolves/animals, other monsters (even human ones), slashers (the original usage of slasher like Jason or Michael lol), lovecraftian horrors, evil aliens (wraith or otherwise), ghosts, apocolyptic scenarios, any kind of supernatural entities, basically pretty much anything goes as long as it's atmospheric, scary as hell and well written.
TIA
Meeshi