* ActingForTwo: Yep.
* GeniusBonus: The signs in the Jewish Quarter are written in Esperanto. In ''Mein Kampf'', Hitler wrote that he thought it was created as a tool to unify the Jewish diaspora.
* HarsherInHindsight: Chaplin only had a faint picture of the atrocities occurring in Nazi Germany when the film was being produced, based on what refugees from Europe had told him. Back in 1940, the worst things have not started yet anyway. He stated that had he known the full extent of the Nazis' crimes, he'd have never made the film.
** [[DoesThisRemindYouOfAnything "We've just discovered the most wonderful, the most marvellous poison gas. It will kill everybody!"]]
** The concentration camp scenes in particular make for quite awkward viewing. Perhaps the most In Your Face example of this trope is when the Jewish Barber first arrives at the camp. Whereas all the prisoners walk in one direction, he walks toward another. When one of the guards asks him where he's going, he cheerfully answers: "The Smoking Room," before being pushed the other way. In Auschwitz, prisoners were pointed to walk in one direction or another, and people waved in the wrong direction got sent to gas chambers.
** Hynkel makes a stirring speech about Tomania's expansion, including France, Finland and Russia. France had already been invaded by Nazi Germany, Russia would be in the next year, and Finland would remain Germany's co-belligerent during the latter.
* HeReallyCanAct: Anybody who thought that Chaplin was only capable of sight gags and slapstick corrected themselves after watching this movie. Then again, it wasn't acting so much as [[AuthorTract Charles Chaplin speaking his mind]].
* HeartwarmingInHindsight: With the allegations UsefulNotes/NaziGermany's influence on Hollywood during its [[UsefulNotes/GoldenAgeOfHollywood golden age]] coming to light, Chaplin's determination to produce an anti-Nazi satire feature film in defiance of it comes off as downright heroic.
* HistoryMarchesOn: Even during production -- at first the British government wanted to ban the movie from showing in the UK, as per the policy of appeasement. By the time it was made, Britain was at war and the movie was embraced for its propaganda value.
* MemeticMutation: For some reason the RousingSpeech has been seeing some spread, in the form of clips like [[http://www.youtube.com/watch?v=V7HtO57f1Es this one.]] Such clips are rather frequently posted under the title "The Greatest Speech Ever Made", or some variant of it.
* MisaimedFandom: UsefulNotes/AdolfHitler watched it at least twice. It is believed he enjoyed it.
** Chaplin says he would've given anything to know what Hitler thought.
* RealitySubtext: The film was prompted when someone pointed out the visual similarities between Chaplin's "Tramp" character and UsefulNotes/AdolfHitler.
* SomeAnvilsNeedToBeDropped: The anti-nazi message isn't exactly subtle but this was the US of 1940 and a large minority in the US had some sympathy for or were impressed by the nazi regime. Effective, easy-to-understand and revealing satire of nazism and fascism was badly needed.
* StockPhrase: "Schtonk!" alone stands for the whole film (up to the point that the German film parody of the fake Hitler diary affair is called this way).
* WhatCouldHaveBeen: In his autobiography Chaplin, who'd resisted for ten years going over to talkies, revealed that his original concept of the film was to mix silent sequences featuring the Tramp with talking sequences featuring The Great Dictator.