* AccidentalInnuendo: "and [Jim] would always call me honey, and pet me and do everything he could think of for me, and how good he always was."
* AngstWhatAngst: Huck's reaction to [[spoiler:finding out his father and Miss Watson had died a while ago]] was either unmentioned or nonexistent.
* BigLippedAlligatorMoment: At one point, Huck and Jim have a conversation that has nothing whatsoever to do with the rest of the story. (It ends with Jim arguing that French people must not be human because they don't speak English.) This was apparently supposed to be funny to nineteenth-century readers, and some critics have contended that Twain included it as a send-up of the minstrel-show comedy routines popular at the time.
** And yet some critics have argued that there is some [[RuleOfSymbolism hidden symbolism]] in that Huck and Jim's several arguments [[DoesThisRemindYouOfAnything are actually about slavery]].
** Arguably it is also set up to show that Huck and Jim are NotSoDifferent, since even with his education, Huck still is unable to counter Jim's logical (for what he is told) points.
** In at least one adaptation, it's made blatantly clear that Jim is playing DevilsAdvocate here to encourage Huck to think more for himself instead of uncritically accepting what other people tell him as fact.
* EndingFatigue: The story comes to a grinding halt once Jim gets locked in the smokehouse - in part because Tom Sawyer, once he finally shows up, seems to be trying to take the book away from Huck.
* EveryoneIsJesusInPurgatory: An attempted [[DefiedTrope defiance]] by the author, but it hasn't stopped generations of scholars from analyzing the heck out of this book.
* FairForItsDay: It's now considered by some to be racist, but is actually a satirical work condemning slavery. Also, we have to understand that back then it was considered highly offensive for a southerner to denounce his society in this way. People cry racism for the outdated terms (n-word being commonly used, whether intended badly or not) but it was radical then. And while Jim is portrayed as being ignorant (being Black at that time, he had not received any sort of formal education; Huck has a hard time explaining how it is that French people don't speak English) he is by no means stupid. In fact, he's generally the smartest guy in the room.
** The fact that people can't see the forest for the trees is sad. If the racist culture portrayed in it offends you... ''that's a good thing.'' Racism ''should'' offend you. Twain (although no saint) felt that the racist society of his time/place was sick, and wrote a powerful if veiled polemic against it. Would a ''racist'' book really have its IronWoobie, believing that even ''God'' is prejudiced against the colored, ''renounce all hope of Heaven'' for ThePowerOfFriendship?
* GeniusBonus: Prior to the American Civil War, the United States did not have a unified money supply. As such, cash printed in big cities was more easier to pay with. On his journey, Huck has to pay a person in cash for a favor. It is accepted without a hitch because the cash was printed in New Orleans, and New Orleans is described as having some of the most reliable currency available. Not a strong case of DidDoTheResearch because Twain knew this tidbit first hand.
** Whole essays have been written on what may or may not exist between Huck and Jim--most famous being "Come Back on the Raft Agin, Huck Honey."
** Tom and Huck, especially with the line "I wanted him and me to be together"
* IAmNotShazam: At no point in the novel is Huck's companion ever called "Nigger Jim"--that came from various descriptions and ties-in to the book shortly after its publication.
* MagnificentBastard: Tom attempts to [[InvokedTrope invoke]] this trope based on the adventure novels he's read... and [[SmugSnake fails.]]
* OneSceneWonder: The book has quite a few memorable characters who only appear very briefly, but the best example of this has to be Colonel Sherburn, who gives a spectacular TheReasonYouSuckSpeech [[ShamingTheMob to an angry mob]], and despite being a cold-blooded murderer, he remains an impressive figure.
* SnicketWarningLabel: See WriterCopOut.
* SurprisinglyImprovedSequel: Has come to overshadow the original, ''TheAdventuresOfTomSawyer''.
** Both unintentionally, as discussed above, and intentionally in regard to Huck's unwillingness to return Jim to slavery. Huck decides to be a CardCarryingVillain, and most of those around him proclaim themselves good and him evil, but it's made apparent that they're not good, and he's a morally righteous rebel, or at worst a NobleDemon.
** Beatings, whether at school or at home, were quite common, and Huck even states that his back doesn't mind anymore.
* WhatDoYouMeanItsNotDidactic: The book is prefaced with a "Notice" threatening with various dire fates any reader who dares treat it as SeriousBusiness. The warning has been universally disregarded, often taken as [[SchmuckBait an invitation]].
* WriterCopOut: Creator/ErnestHemingway thought so, saying that it was a great book but that "if you read it, you must stop where the Nigger Jim is taken from the boys. That is the real end. The rest is just cheating."