History Film / GlassOnion

* ArtisticLicenseChemistry: Klear is described as a "solid hydrogen fuel" that Miles plans to implement, powerful and dangerous enough to [[spoiler:blow up the entire Glass Onion complex]]. There are [[https://www.hydrogenfwd.org/spoilers-glass-onions-klear-hydrogen-fuel-is-clearly-the-stuff-of-hollywood-fiction/ a large number of scientific and logistical issues with this plot point.]]
* ArtisticLicenseEngineering: The danger of Miles' plot to implement Klear and "turn people's home into the Hindenburg" has [[https://www.hydrogenfwd.org/spoilers-glass-onions-klear-hydrogen-fuel-is-clearly-the-stuff-of-hollywood-fiction/ a number of issues]] with regards to leakage, regulations, and the aforementioned comparison with UsefulNotes/TheHindenburg itself.

** Likewise, [[spoiler:after Miles gives Duke a hug and steals the gun,]] one can see [[spoiler:the bulge in the back of Miles' pants and Miles throwing Duke's gun into the ice bucket in the cocktail mixing table.]] And if you listen ''really'' carefully, [[spoiler: you can even hear the sound of Miles's hand on Duke's gun during said hug.]]

** Likewise, one can see [[spoiler:Miles throwing Duke's gun into the ice bucket in the cocktail mixing table shortly after he gives Duke a hug.]] And if you listen ''really'' carefully, [[spoiler: you can even hear the sound of Miles's hand on Duke's gun during said hug.]]

* MurderIsTheBestSolution: The killer's response to people threatening them is to default to lethal measures of resolving the problem instantly in the short term. It tends to work for them ''precisely'' because none of their victims consider them capable of instantly resorting to murder [[spoiler:because of how ''stupid'' a move it would be for them to resort to without trying alternative methods first. Blanc even notes that Miles would have been the ''first'' suspected in the event of foul play once Andi's death was made public, and the fact that Andi underestimated Miles' long-term planning capability is why she wasn't more cautious around him, leading to her death]].

** Likewise, one can see [[spoiler:Miles throwing Duke's gun into the ice bucket in the cocktail mixing table shortly after he gives Duke a hug.]]

* ArtisticLicenseEngineering: The danger of Miles' plot to implement Klear and "turn people's home into the Hindenburg" has [[https://www.hydrogenfwd.org/spoilers-glass-onions-klear-hydrogen-fuel-is-clearly-the-stuff-of-hollywood-fiction/ a number of issues]] with regards to leakage, regulations, and the aforementioned comparison with the UsefulNotes/TheHindenburg itself.

** Look closely at Peg when Miles says "inbreathiate": She noticed the malapropism too. You can even see her look at Blanc, as if she's asking "You heard that too, right?"

* SouthernFriedGenius: Benoit Blanc, obviously, as well as [[spoiler: Helen Brand.]]

* AbortedArc: [[spoiler:Helen]] is shown to have a recording device that she, at one point, slips into Birdie's purse, recording an incriminating conversation between her and Peg about Birdie's dirty laundry that [[spoiler:Helen and Blanc]] listen to later. This seems to be potentially setting up the opportunity to have an EngineeredPublicConfession in the climax, where the murderer is CaughtOnTape gloating about their crime. Instead, the recorder is never used again and plays no more role in the movie.

* RefugeInAudacity: Miles believes Disruption Theory relies on breaking a rule openly and brazenly and succeeding, then continuing to push and break more and more rules until you reach a point where nobody is able to stop you. It's [[spoiler:why he was able to get away with killing Andi and racing off in his [[MetallicarSyndrome extremely noticeable car]] (well, this and PoliceAreUseless). Benoit Blanc is both surprised and appalled that Miles, the extremely obvious suspect of said murder, was [[StupidCrooks so damned]] StupidEvil that this actually removed him from the list of suspects.

*** To a lesser degree, there's also the false disruption of ignoring safety regulations and precedents in engineering and technology, such as all the issues with Klear. Had Miles died during the explosion, there would probably be comparisons to [[https://en.wikipedia.org/wiki/Titan_submersible_implosion Stockton Rush]] as well.

* ArtisticLicenseEngineering: The danger of Miles' plot to implement Klear and "turn people's home into the Hindenburg" has [[https://www.hydrogenfwd.org/spoilers-glass-onions-klear-hydrogen-fuel-is-clearly-the-stuff-of-hollywood-fiction/ a number of issues with regards to leakage, regulations, and the aforementioned comparison with the UsefulNotes/TheHindenburg itself.]]

* DeconstructedTrope: A common murder mystery set up is a rich person invites a group of people, all of whom have a history with, to their estate. The guests all have a reason to wish the host harm and then, when the host dies, the rest of the mystery is finding out ''who-done-it?''. The movie asks the question "who is dumb enough to actually set up a situation like that?". This is possibly foreshadowing how [[spoiler:Miles is an idiot billionaire whose only idea of reasonable thought is something is stole from Benoit Blanc, the one man in the room who has any level of intelligence]].

* HypocriticalHumor: Benoit Blanc rants about how he hates TabletopGame/{{Clue}}. Aside from the obvious irony of a detective hating a murder mystery game, the exact things he says make it terrible, "ticking boxes, running around, searching all the rooms", are exactly what he and [[spoiler:Helen]] spend their entire investigation doing.

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* DeconstructedTrope: A common murder mystery set up is a rich person invites a group of people, all of whom have a history with, to their rich estate. The guests all have a reason to wish the host harm and then, when the host dies, the rest of the mystery is finding out ''who-done-it?''. The movie asks the question "who is dumb enough to actually set up a situation like that?". This is possibly foreshadowing how [[spoiler:Miles is an idiot billionaire whose only idea of reasonable thought is something is stole from Benoit Blanc, the one man in the room who has any level of intelligence]].

* DeconstructedTrope: A common murder mystery set up is a rich person inviting a group of people, all of whom have a history with. The guests all have a reason to wish the host harm and then the rest of the mystery is finding out ''who-done-it?''. The movie asks the question "who is dumb enough to actually set up a situation like that?". This is possibly foreshadowing how [[spoiler:Miles is an idiot billionaire whose only idea of reasonable thought is something is stole from Benoit Blanc, the one man in the room who has any level of intelligence]].

** ''Art/TheMonaLisa'' appears in the film as one of Miles' arrogant trophies, and the subject's mysterious qualities are set off against Andi, the most inscrutable person in the cast by that point. Miles describes the painting as being something simple at first glance that surprises you with its depth and shifting character, and [[spoiler:the easy-to-grasp resentful Andi is really a whole other character--her sister Helen undercover investigating Helen's death with Blanc, making her mystique well-founded and just as layered as the painting.]] Later, in the scene building to [[spoiler:Duke's murder]], closeups on the ''Mona Lisa's'' eyes and smile give her a watchful, knowing presence in the room, paralleling how [[spoiler:"Andi" and Blanc are working together and know much more than the audience does.]] By the end of the film, [[spoiler:the painting is destroyed and Helen, impersonating Andi, essentially replaces the ''Mona Lisa'', imitating the figure in the last shot as a woman with many secrets and unusual reasons to smile.]]

* {{Blackface}}: Alluded to when Birdie Jay insists that the Halloween costume that landed her in hot water was supposed to be a tribute to Music/{{Beyonce}}, though we [[NoodelIncident never see]] what exactly her costume looked like.