* ActorAllusion: [[Creator/CillianMurphy Rippner]] is no stranger to [[TheWindThatShakesTheBarley being directly threatened with a bat]]. [[Film/BatmanBegins Or a bat.]]
** Also, Creator/CillianMurphy is in a movie called [[Film/TwentyEightDaysLater Red Eye.]]
** Received one of its own in ''{{Film/Inception}}'', another film that puts Murphy on a plane for the bulk of its run-time.
* DuelingMovies: Was released around the same time as ''Film/FlightPlan'', which also revolves around a woman on an airplane terrified for the safety of a family member. This film though was a little better received.
* EnforcedMethodActing:
** When Lisa bumps into a woman and has coffee spilled on her clothes, Rachel [=McAdams=]'s reaction is genuine. She did not expect the coffee to be so cold, and it had spilled on her more than she had expected.
** Though not featured in the film, Cillian Murphy had missed the spot to throw Rachel [=McAdams=] while filming the lavatory scene, knocking her unconscious for half an hour. When they had to film the scene again, Murphy was afraid to. This scene can be found in the bloopers. The scene featured in the film briefly shows that Murphy has his hand behind [=McAdams=]'s head to protect it.
* ExecutiveMeddling: The terrorists were meant to be American, but the good people at FOX did not like the idea of this, hence why they switch from speaking English at the start to Russian later in the film.
* FakeAmerican: Cillian Murphy is Irish and Wes Craven was initially wary about casting him as Rippner since Rippner was explicitly written as American. When Murphy walked into the audition, he actually fooled the casting agent with his accent.
** Also, there's Canadian Rachel [=McAdams=] and Australian Brian Cox.
* [[HeyItsThatGuy Hey, It's That Guy]]: In addition to the [[Creator/RachelMcAdams leading]] [[Creator/CillianMurphy actors]], there's also Lisa's friend Cynthia, who went on to play Emma on ''Series/{{Glee}}''; and [[Series/{{CSINY}} Mac Taylor's stepson.]]
%%* HilariousOuttakes
* WhatCouldHaveBeen:
** Wes Craven initially wanted Sean Penn and Robin Wright Penn to play the leads, but later opted it to younger leads.
** He also specifically wanted an American to play the role of Jackson Rippner, but he eventually gave the role to Irish actor Cillian Murphy.
* WriteWhoYouKnow: One of the hotel's obnoxious customers is based on (and played by) a [=DreamWorks=] executive.
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