* The exact nature of the crew of the Cygnus. [[spoiler: Lobotomized by Reinhardt into [[{{Brainwashed}} mindless, subservient drones]] who can only continue to perform their tasks aboard the ship.]]
** The ending of the film with regard to these poor souls does not help in the slightest. [[spoiler: The last we see of [[BigBad Reinhardt]] and [[TheDragon Maximillian]] is Reinhardt's eyes darting madly to and fro from within Maximilian's visor, undeniably insane, as the new entity rules over the wreckage of the Cygnus, ''and its mindless, but entirely innocent crew'' in what looks to be a [[FireAndBrimstoneHell massive fiery cavern]].]]
*** [[spoiler: That's only NightmareFuel if you assume the figures seen in the hellscape are the actual crew members' souls, and not just another element of the environment custom-made to torment Reinhardt himself. It's possible that their ''actual'' spirits departed their bodies when they underwent the brain surgery that turned them into drones, long before the ''Cygnus'' entered the black hole.]]
* [[KillerRobot Maximillian]], just by himself, is a perfect example. Between the [[ThisIsADrill whirly-blades]], [[ImmuneToBullets immunity to]] [[FrickinLaserBeams lasers]], some [[FrickinLaserBeams lasers]] of his own, a [[CyberCyclops single]] [[GlowingEyesOfDoom glowing]] [[RedEyesTakeWarning red eye]] with a particularly intimidating furrowed shape, the menacing hum of the servos as he moves, and the way he just [[ImplacableMan keeps coming]] while [[{{Flight}} completely ignoring terrain]], [[spoiler: and eventually [[TurnedAgainstTheirMasters engulfs his own creator]] and [[{{Satan}} presides over hell itself]],]] how could you not have nightmares for years afterwards?
** Then there is his [[ThisIsADrill execution]] of Durant, which prompts Reinhardt himself to beg for protection from his creation. (Although he might just be playing the sympathy card -- he curses out Maximilian for killing Alex, but Alex ''had'' just found out Reinhardt's secret.)
* What makes this all the more unsettling is that the movie was produced by ''{{Disney}}!''
** No wonder they won't re-release it.