* Why did they have to go to the bow thrusters? Because modern ship's props are electrically driven - there wasn't any internal 'propeller shaft' to go to. The power is generated by a number of giant diesel engines called "prime movers," similar to how diesel locomotives do it - and one of them actually kills a character falling through the ship's flooring: [[spoiler:Lucky Larry.]]
* ActorAllusion: Creator/KurtRussell tells the kid to jump into a curtain so they can catch him. He tells the mother not to worry that he used to be a fireman. Russell played a fireman in ''Film/{{Backdraft}}'' (1991).
* CreatorKiller: For Creator/WolfgangPetersen. He hasn't directed anything since despite his track record before it.
* TheDanza: Creator/RichardDreyfuss as Richard Nelson
* HeyItsThatGuy:
** Why everyone is so worried? They've got [[Film/EscapeFromNewYork Snake Plissken]] and a [[Film/StarTrek young Captain Kirk]] on the team!
** [[Theatre/ThePhantomOfTheOpera Can it be? Can it be Christine?]]
*** And she's engaged to [[Film/{{Cloverfield}} Jason Hawkins!]] Phantom and Raul are gonna be pissed.
** [[Film/{{Jaws}} Matt Hooper's]] been on sinking ocean vessels before...
* OldShame: Perhaps an ''inversion'', seeing as [[Creator/WolfgangPetersen the director]] hasn't made any films since this one.
* MoneyDearBoy: RichardDreyfuss's [[http://www.movieweb.com/news/richard-dreyfuss-answers-an-age-old-question-with-poseidon major reason for doing the film]]:
--->[T]hey offered like a lot of money and I love money and didn't have a lot and I thought this is a good way of doing this.
* StarDerailingRole: The film also helped ruined Josh Lucas's budding leading man career, where that and along with ''Film/{{Stealth}}'' the previous year, pretty much dimmed his hopes at major stardom.
** Sometimes assumed to have done the same for Dreyfuss too, but as the above-linked interview shows he had been planning to semi-retire anyway (and that wasn't permanent, either).
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