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* AnticlimaxBoss: The governor. [[ImplacableMan Reza on the other hand]]...
* SugarWiki/AwesomeMusic: Music/EnnioMorricone at his usual finest throughout--albeit with a rather "trippy" twist. It's worth noting the score has often received more recognition than the actual movie.
* CompleteMonster: {{Colonel|Badass}} Günther "Gutierez" [[TheHeavy Reza]] is a [[SilentAntagonist silent villain]] who, throughout the movie, doesn't express a single emotion beyond self-satisfaction. He [[ColdBloodedTorture tortures Dr. Villega]] into identifying various members of a crowd as revolutionaries, then has them shot in front of him, smiling a little wider with each body that hits the ground. He's also the man responsible for the deaths of Juan's children and father, singlehandedly [[KnightOfCerebus causes the film to shift]] from BlackComedy to serious drama, leads an army ([[ANaziByAnyOtherName based on Italian fascist stormtroopers]]) that seems intent on [[SociopathicSoldier killing or imprisoning everyone they meet]], and in the climax, guns down [[spoiler:Mallory]] [[InTheBack from behind]]. This, coupled with his ImplacableMan status makes him utterly terrifying.
* EarWorm: "Sean-Sean...Sean-Sean..."
* EndingFatigue: Especially in the restored version, with a final flashback that interrupts the climactic battle for several minutes.
* JerkassWoobie: Juan, who had been established previously as a bandit, rapist and highwayman, is also subjected to bullying and brutal verbal abuse from a group of racists while riding in the same stage coach as them. He fully crosses into this in the second act, after [[spoiler:seeing his family killed]].
* MoralEventHorizon: Colonel Reza and the Mexican army cross it with the [[spoiler:murder of Juan's children.]]
* {{Narm}}: Despite Music/EnnioMorricone delivering his typical SugarWiki/AwesomeMusic...the "Sean-Sean" song can ''really'' ruin the moment with just how ''trippy'' it is!
* OvershadowedByAwesome: Has the misfortune of falling in between two of Leone's most celebrated films.
* SurprisinglySimilarCharacters: Juan and Max Lozoya from ''Don't Turn the Other Cheek'', which came out the same year. Both become revolutionary heroes by no will of their own and [[spoiler:both had their families killed by soldiers.]] Also, as mentioned below, Eli Wallach was meant to play one but ended up playing the other.
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