Finalist and judge's top choice in Equestria Daily's 2012 Nightmare Night contest.

Fluttershy has been plagued by nightmares, and Twilight wants to help her get rid of them. But when the bookish mare begins to pry into the depths of Fluttershy's unraveling psyche, she finds more questions than answers. What do her dreams mean? Why won't they stop haunting her? And why does the creature she keeps seeing inside them seem like more than just a simple night terror?

Pinkie Pie is being tormented by horrific nightmares. Unable to deal with it by herself anymore she seeks out Twilight's help, but will it have been the best decision when she finds herself alone in an abandoned, fog filled Ponyville?

Sequel: http://www.fimfiction.net/story/4676/Too-Shy-for-a-Rainbow

There have been a LOT of high-quality readings of Silent Ponyville, but this one is my personal favorite:
https://www.youtube.com/playlist?list=PLGh01rbB4o3xoSV7a6Omc-UJROXHRZ1Hv

The mane six take shelter in a place that is, for now, safe from a disaster occurring outside.

This gruesome tale of violence and death is not recommended for colts, fillies, or the faint of heart.

"Dear Princess Celestia, what do you think it would be like to kill somepony...?"