!!The 1972 film:
* AdaptationDisplacement: Not so severe as some examples, but the book is much less famous than the film.
* HilariousInHindsight: 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]].