Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: Fear Factory
"Suffer Age". If the lyrics based upon the murders committed by John Wayne Gacy don't scare you, the ominous guitar riffing at the beginning will.
"Christploitation" is a good five minutes of the band reminding you that God doesn't exist, the afterlife doesn't exist, and you will become nothing after death. Also, pianos are still creepy as all hell.
The outtros to pretty much all of the closing tracks are pretty unnerving, especially "A Therapy for Pain" and "Final Exit".
"Slave Labor". The song itself isn't really that scary, save for the synths in the main riff, but the subject matter is about self-immolation, which means burning yourself alive. The chorus actually has the line, "Help me pour this gas on me!".