!FridgeBrilliance:
* The movie has been pushing the idea that being educated will get you ahead in life, but in the finale, Arthur pulls a sword out of a stone which has nothing to do with education. However, Merlin can see the future and probably knew he was destined to become King Arthur. And all that education will make Arthur a better king: Arthur knows what it feels like to be small and weak and surrounded by stronger predators far worse than even what you'd find among humans, and he has been taught to favor "brains over brawn", which will, Merlin hopes, allow him to pull England out of the Dark Ages.
* Arthur's excitement at being Kay's squire, and his refutation of Merlin's assessment that it's a stupid venture, makes more sense when the social structure of the Middle Ages is taken into account; becoming a knight would be a rare opportunity for a boy who isn't "of proper birth" to become part of the nobility.
* Given that the film inadvertently states that the year is 585, that would mean that the London where Excalibur is seen in is not Greater London (or Westminster), but rather the Roman City of London.
** In a similar way, the fact that Merlin gives the year and estimates the Wart's age also gives the boy's year of birth: around 574-573.
* While Kay's (under)reaction to Merlin's blizzard may have been intended as apathetic, remember the story is set in [[UsefulNotes/BritishWeather England]].
* When Merlin sends Archimedes to listen in on Sir Pellinore's big news from London, the owl initially steadfastly refuses. While it can be chalked up to his usual grumpiness, owls evolved to be silent flyers due to no longer waterproofing their feathers as other flying birds do. Therefore Archimedes would struggle to fly during the heavy downpour as his feathers would absorb water and weigh him down.
* In the [[ShapeshifterShowdown transformation showdown]], in comparison to Madam Mim who takes on the forms of larger animals/predators that have conventional advantages over their prey, Merlin takes on the form of animals that require wit to use, using one's small size to maneuver around larger ones, taking advantage of superstitions around animals, or in one case, added weight mass to counter being eaten- relying on self-defense- keeping ahead of her throughout the fight. The moment he turns into a ram, one with natural offensive capabilities, which goes against his strategy, the table briefly turns as Madam Mim turns into a purple dragon via a loophole in the agreement and uses its inherent mythical properties to briefly outwit his attempts to hide. This initially seems to be Madam Mim reversing his strategy back on him until he one-ups her in exposing her ignorance. Rather than turning into an even more powerful mythical creature to overpower her, he turns into the smallest yet potentially dangerous of the animals he takes- bacteria, which immediately has her bedridden. It shows Merlin's true knowledge and education leading him to become a truly dangerous creature, even more so than a dragon, one that can wipe out entire populations- driving them to extinction, something that is overlooked too small to even see and can only be prevented by proper insight rather than raw power. It validates Merlin's teachings about brains being better than brawn.
** It shows their personalities' strengths and weaknesses- Madam Mim takes on forms with conventional advantages of brute force while her trump card is something that is taken as both a technical loophole and based on local ignorance- the biggest, ultimate creature that seemingly has no weakness. In contrast, while Merlin briefly takes on the brute force strategy with the ram, he mostly sticks to small creatures that use their tiny size to escape or briefly his larger weight as a walrus to subdue Mim. His trump card is something that can only be known through knowledge- bacteria that causes Mim to be stricken with sickness, not only that, it is actually the more dangerous of the two in spite of being too small to see conventionally, due to countless variants causing far more devastating consequences if not treated with the proper countermeasures.

!FridgeHorror:
* Congratulations, Arthur! You're a child king in Medieval England! You're basically surrounded by hostile nations, the country's been in a leaderless quagmire of indecision for most of your lifetime, your trusted advisor flies into a rage and ditches you at the very ''idea'' of you being involved in combat, and your only preparation for all this has been the dubious lessons of being turned into amusing animals. ...Good luck![[note]]Thankfully, you're a [[LighterAndSofter Disney monarch]], so you basically just get a vague, implied HappilyEverAfter. At least until they decide to make ''[[{{Sequelitis}} Sword In The Stone 2]]''. Though on the bright side, you might hook up with a human version of [[FanPreferredCouple that girl squirrel!]] [[/note]]
* As [[Creator/DisneysNineOldMen Frank Thomas and Ollie Johnston]] point out in their book ''Literature/TheDisneyVillain'', Kay is what Wart would have become if Merlin hadn't entered his life, Wart hadn't pulled out the sword and stayed under Sir Ector's thumb--he would have eventually degenerated into a surly, cynical bully with a dull witted ego.
* Madam Mim's status as TheDreaded, coupled by the way she talks to Arthur while trying to kill him implies that she's killed people before. And her reason for wanting to kill Arthur is extremely petty, so who knows how many people she's murdered for little to no reason in the past ...
* People who have seen how Arthur's story goes [[DownerEnding down]] will be having this by the end of the movie: Arthur's wife will cheat on him, he will dedicate his life to sending knights to look for a mythical treasure but they will all die before finding it while the country slowly falls apart until he dies himself in a battle. Weee.
** This is softened by Merlin mentioning that Arthur will go down in legend and will have [[BreakingTheFourthWall a motion picture]], even bringing up the Knights of the Round Table.
** Not to mention that he will have a child with ''his own freaking sister''!
* During the squirrel scene, when Arthur is having trouble with the female squirrel, Merlin sings a song about love that sounds more like a song about rape. ("You're wasting time resisting/You'll find the more you do/The more she'll keep insisting/Her "him" has got to be you.")
** In the original legend, Merlin ''allowed and helped'' Arthur’s father to bed with his friend’s ''wife'' which is how Arthur was conceived.
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