Pink Floyd/Nightmare Fuel

""The Lord is my shepherd, I shall not want He makes me down to lie Through pastures green he leadeth me the silent waters by With bright knives he releaseth my soul He maketh me to hang on hooks in high places He converteth me to lamb cutlets For lo, he hath great power and great hunger When cometh the day we lowly ones Through quiet reflection and great dedication Master the art of karate Lo, we shall rise up And then we'll make the bugger's eyes water.""
 * Most of the animation from The Wall.
 * Speaking of The Wall, while the entire album is creepy, two tracks stand out. Most of "Don't Leave Me Now" sounds extremely disturbing, and the beginning of "Is There Anybody Out There?" resembles something from a horror movie. Thank God it turns into a nice-sounding guitar melody.
 * "Goodbye Blue Sky". It starts with a soothing guitar riff, then the terror sets in. "D-D-D-DID YOU SEE THE FRIGHTENED ONES? D-D-D-DID YOU HEAR THE FALLING BOMBS?"
 * "Look mummy, there's an aeroplane up in the sky"
 * But in the town it was well known / when they got home at night / their fat and psychopathic wives would thrash them / within inches of their lives!
 * The meat grinder in "Another Brick in the Wall (Part 2)".
 * "Careful with That Axe, Eugene"
 * The ethereal wailing sounds at around the 11-minute mark in Echoes.
 * The title track off of A Saucerful of Secrets up to the "Celestial Voices" movement.
 * The live disc of Ummagumma, which contains the aforementioned "Careful With That Axe, Eugene" and "A Saucerful Of Secrets", as well as unnerving versions of "Astronomy Domine" and "Set The Controls For The Heart Of The Sun".
 * "Come In Number 51, Your Time Is Up", the Zabriskie Point version of "Eugene", is even harsher and scarier.
 * "Sheep" may also qualify as this. Halfway into the song, there is very eerie Hammond organ, followed by a corrupted version of Psalm 23 which could give you nightmares:

""Won't you miss me? Wouldn't you miss me at aaaAAAAAAAALL""
 * The whole of Dark Side of the Moon is so, so unsettling. "There's someone in my head... but it's not me."
 * "You raise the blade...you make the change...you rearrange me til I'm sane." Good grief.
 * "ONE OF THESE DAYS, I'M GOING TO CUT YOU INTO LITTLE PIECES!!!"
 * While "Welcome to the Machine" is a pretty dark song to begin with, the music video is just as disturbing as the animated scenes from "The Wall".
 * Not exactly a Pink Floyd song, but Barrett's "Dark Globe" is both heartbreaking and terrifying. It's a Sanity Slippage Song written by a man who was actually turning insane.