* ''Scenes From a Memory'' is incredibly unsettling. It begins with a very calm hypnotist and then his patient relating information. All of the spoken word aspects are very monotone, but the singing sounds strangely upbeat and then the background noises start getting harder to ignore.
** "Open your eyes, Nicholas." [[spoiler: * THUD* * static* ]]
** Especially disturbing as the "Open your eyes" comes up earlier in the song: "[[spoiler: * BANG* * SCREAM* "Open your eyes, Victoria" * BANG* ]]". The whole murder scene is incredibly creepy simply because it's related with sound rather than lyrics.
* The last 2 minutes of "Misunderstood". LastNoteNightmare indeed.
* ''Don't cross the crooked step!''
* "Panic Attack." The lyrics are disjointed and the music is chaotic to symbolize a panic attack, and hot damn. It makes you feel as if you're having one. If you're prone to panic attacks, you'll know that it's pretty accurate.
** There's also "Voices", which really captures the horrors of schizophrenia. The Pink Floyd-ish chord progressions combined with the disturbing lyrics about the hallucinations that schizophrenics suffer make the song incredibly unsettling.
** Similarly, ''all'' of ''Six Degrees of Inner Turbulence'' can be Nightmare Fuel to anyone who has one of the disorders the songs are based on. Dream Theater does a disturbingly good job conveying these sort of things in music.
* "In The Presence of Enemies: Part 2" begins with the sound of wind followed by a very creepy bass and piano part. James [=LaBrie=]'s singing in this section also helps with making you feel uneasy.
* "The Dark Eternal Night". The lyrics are about a mummy coming back to life and summoning an undead army to take over the world. As if that wasn't bad enough, the music is extremely violent in its tempo changes and even has a very creepy honky-tonk piano section that always is enough to creep one out.
* "The Enemy Inside" is already a disturbing enough song about PTSD, but the video actually shows a frighteningly realistic depiction of what PTSD is like, with a father always being unable to execute simple everyday tasks without worrying about being shot. It's very terrifying.
* "Forsaken", a song about man who encounters a vampiress and [[TheWorldIsJustAwesome she shows him all these wonders]]...but we realize [[DyingDream she's been drinking his blood the whole time]]...