* ActorAllusion: Adam Brody is wearing a ''Film/FightClub'' T-shirt while being interrogated by Brad Pitt. [[CelebrityParadox Presumably, Tyler Durden was played by somebody else in this universe]]. John's yellow/orange sunglasses later in the movie are also suspiciously similar to a pair seen on Tyler Durden.
* MissingTrailerScene: Due to over an hour of scenes being cut before release, the trailers were filled with these. Every scene with Creator/KeithDavid and additional scenes with Creator/VinceVaughn are gone.
* RealLifeRelative: Not at this stage but soon afterwards, the romance between Brad Pitt and Angelina Jolie was already well publicized before the movie came out, to the point that some initially assumed that this was a ''Film/{{Gigli}}''-style attempt at capitalizing on their romance. Apparently, they fell in love on the set.
* RecycledTheSeries: They tried to do this with this film.
* RomanceOnTheSet: Pitt infamously started a romance with Jolie while filming.
* ThrowItIn: The scene where John accidentally shoots through Jane's windshield was supposed to have him hopping over the last fence, but Brad Pitt actually tripped and broke the fence. However, his muttered line of "Oh, dear God!" as he rushed through the mangled fence was so amusing that the director kept the scene the way it was.
-->'''John:''' Nononononono! ''Accident!''
* WhatCouldHaveBeen: Brad and Angelina were both replacements when filming began to snarl. Before the two of them were confirmed, others such as Creator/WillSmith, Creator/JohnnyDepp, Creator/NicoleKidman, and Catherine Zeta-Jones were considered. Now try to imagine both A) the movie with any combination of the previous actors, and B) a world without over a decade of Brangelina.
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