!!The 1972 film:
* AdaptationDisplacement: Not so severe as some examples, but the book is much less famous than the film.
* HilariousInHindsight: Creator/LeslieNielsen playing it straight as the captain of the ''Poseidon'' in a disaster movie, seven years before ''Film/{{Airplane}}'', a spoof of disaster movies. The [[LeslieNielsenSyndrome Syndrome]] was still [[Series/PoliceSquad a decade away]].
* NightmareFuel: The guy who falls ''into the ceiling light''.
* TheScrappy: Nonnie for being TheLoad, and Robin for being a know-it-all.
* TearJerker: After [[spoiler:Mrs. Rosen dies, her husband refuses to leave her side]].

!!The 2005 TV movie:
* WhatAnIdiot: The Cruise Director, who gives away Rogo's purpose as a sea marshal, and insists that everyone stay inside the dining room, even after it's pointed out that the ship will inevitably sink.
* WhatDoYouMeanItsNotSymbolic: Near the end of the film, the survivors have to cross over a pit of fire via a narrow bridge. The only ones who don't make it are [[spoiler: Badawi, who masterminded the terrorist plot, and Shoshanna, who was Richard's mistress]].

!!The original novel:
* ValuesDissonance: The whole "Susan getting raped" subplot, full stop. Not only is the attack itself [[GratuitousRape completely superfluous to the plot]], but Susan's reaction to it (she sympathizes with her attacker, to the point of mourning his death, planning to meet his parents after getting rescued, and ''hoping she's carrying his rape-child'') could only be the product of a male author from a pre-feminist generation.