[[caption-width-right:298:What would Creator/MarkTwain have thought?]]A 1995 film based loosely on ''Literature/AConnecticutYankeeInKingArthursCourt''.

A young kid, Calvin Fuller (Thomas Ian Nicholas) is playing a baseball game when an earthquake opens up a rift in the ground and transports him to the 6th century, where he meets up with Myth/KingArthur. He also encounters the spirit of Merlin, who confirms that it was his magic which pulled Calvin back to Camelot. There are a lot of problems afoot, and Merlin will only send Calvin home if he puts things back to rights. Along the way, he falls in love with one of King Arthur's daughters, tosses off a lot of anachronisms in failed attempts to be funny and ends up getting transported back to his baseball game.

Has a rather forgettable direct-to-video sequel entitled ''A Kid In Aladdin's Palace''.
!!Tropes present:

* AdiposeRex: King Arthur has really let himself go in his old age.
* AluminumChristmasTrees: Calvin claims that he knows about Arthur's sword Excalibur because "I watch a lot of CNN." CNN did have little trivia tidbits back in the '80s and '90s before commercial breaks.
%%* AnachronismStew:
* ArrangedMarriage: Arthur is attempting to put together a marriage for his elder daughter Sarah, which distresses her because she already has a guy in mind. [[spoiler: When the Black Knight reveals himself ''as'' Sarah, Arthur gives his blessing to her choice.]]
* BambooTechnology: Calvin ends up making "medieval" flavored versions of 1990s technology.
* BlackKnight: A subversion; someone of this description initially appears like an antagonist but is actually a master jouster and gives to the people.
* CallBack: At the start Calvin's coach tells him to remember three things but then lists four things instead. When Calvin starts training with Master Cain, he says the same thing.
* {{Chickification}}: Princess Katy has a sharp drop in physical competence in the final act and it leads to kidnapping from which she needs to be rescued.
* ContrivedCoincidence: Luckily, right before the earthquake swallows him whole, Calvin grabs his backpack. Even more luckily, said backpack just happens to contain a number of items he will need on his adventure, like a flashlight and a Swiss army knife. Why would he bring those things to a baseball game?
* {{Disneyfication}}: Of Mark Twain's original novel. The book was a satire and GenreDeconstruction of Arthurian lore that ended on a pretty depressing note, with the protagonist having all his achievements undone, then losing his friends, family and mind before finally dying. In this film, the entire plot thrown out in favor of a more conventional children's film with a hip, young protagonist, a Camelot that wouldn't be out of place in a theme park, and an unambiguously happy ending.
* EarnYourHappyEnding: Both Calvin and [[spoiler:Princess Sarah]]. Calvin, of course, earns the right to go home. [[spoiler:Sarah, by defeating Lord Belasco and winning the tournament for her hand in marriage, has - in her father's words - "won the right to choose," and of course opts to marry the man she loves.]]
* EverythingsBetterWithPrincesses: Arthur has two daughters who are major characters.
* FallingChandelierOfDoom: Lampshaded and subverted: The title character cuts the rope attached to a chandelier, but it doesn't fall, causing him to comment that "this always works in the movies". How the chandelier isn't falling even though its support is cut is never explained.
* FauxActionGirl:
** Played straight with Princess Katy; In the training sequence is shown to be an excellent swordswoman, archer, and horsewoman; thus she should be "of course, able to take care of herself". Except, then she gets kidnapped by some mooks, in broad daylight, and needs to be rescued by Calvin and King Arthur. A fight begins. Now on the good guys' side we have Arthur (a very old man), Calvin (a nerd who fails at baseball and has only trained in swordplay for a couple of days) and Katy (who is young, fast, and has trained in swordplay all her life). Arthur and Calvin fight and kill the mooks while Katy, who really should be "...able to take care of herself," gets kidnapped ''again''.
** The film also subverts the trope, with Katy's older sister Princess Sarah. The viewer spends the entire movie believing that tomboyish Katy is the tough one of the pair, only to find out that [[spoiler:Sarah is the secret identity of the Black Knight, who has been fighting the enemy all along.]]
* FirstKiss: Calvin gives Katy hers, a happy moment which is unfortunately followed immediately by her abduction.
* GrailInTheGarbage: Excalibur, which Princess Katy refers to as "just Father's old sword," has been left to molder in the filthy castle dungeon.
* GroinAttack: Calvin gets one in while fighting.
* HeroicBSOD: According to Princess Katy, Arthur suffered something like this after Guenivere died; she says that her father has never been the same since.
-->'''Katy:''' I miss my mother deeply, but I miss my father even more.
* IHaveYourWife: Katy is abducted on Lord Belasco's orders, so he can both make Arthur get rid of Calvin and force Sarah to agree to marry him. Of course, when Arthur and Calvin show up with the unharmed Katy, this doesn't work.
* IdiotBall: Once Arthur learns Belasco schemes to usurp the throne; rather than have Belasco thrown in the dungeon, Arthur lets Belasco go free until the tournament. It is somewhat justified in that Belasco had become a major power in the kingdom whom many of the soldiers followed instead of the king. Throwing him in the dungeon was politically risky so he had to let Belasco disgrace himself.
* TheLadysFavour: It is not a conventional example; Sarah and Calvin are initially the only ones who know that Katy has been kidnapped. Sarah urges him to go to Arthur and tell him what's happened and who is responsible, as she feels Arthur is Katy's only hope. She gives Calvin her handkerchief to give to her father, so that he will know Calvin was sent by her and is telling the truth.
* ALittleSomethingWeCallRockAndRoll: Zigzagged. Played straight with Calvin's Discman. Then subverted later when he pulls it out again, only to use the lens inside to reflect light and blind a guard. What does he use when challenged to combat? "[[ThePowerOfRock I choose...]] [[Music/TheClash Combat Rock!]]" Cue guards holding their ears while Calvin rocks out.
* LoserProtagonist: Calvin starts the film this way; at the baseball game just before the earthquake, he is so intimidated by the flying fastballs that he doesn't even swing, and strikes out without moving a muscle. It's implied that this is not unusual for his character. Naturally, during his time in Camelot, he [[TookALevelInBadass takes a level in badass]] and returns to his own time to lead his team to victory - with a baseball bat from the "Excalibur" brand, no less!
* ObviouslyEvil: Lord Belasco. When a character is first introduced as the king's trusted and loyal adviser, and the very first shot of the movie that he's in shows him as a tall dark man with black robes, a black horse, black hair with white streaks, a sinister smile, and ominous background music, it's just insulting to our intelligence. He's like [[Disney/{{Aladdin}} Jafar]], except he's not hypnotizing the king, so the king really has no freaking excuse for trusting him.
* ParentalMarriageVeto: The subplot of the film is that Princess Sarah has refused to choose a suitor, so a tournament must be held to find a husband for her. She refuses to choose a suitor because the man she loves, Master Cain, is not of high enough rank to ask for her hand.
* SamusIsAGirl: [[spoiler: Because of the Black Knight's full body armor and helmet, everyone assumes that a man is underneath it all.]]
* SelfProclaimedKnight: The master jouster Black Knight is revealed to be [[spoiler:[[SamusIsAGirl Princess Sarah]]!]]
* SpiritAdvisor: Merlin appears only as a reflection in a well and only speaks to Calvin. It's not clear what happened to him or if he's dead; he's just said to have disappeared a long time ago.
* ThatPoorCat: When Calvin fires an arrow through a window by accident, it hits a cat.
* TomboyAndGirlyGirl: The two princesses; Katy is the tomboy who enjoys sword fighting and archery while Sarah is more interested in courtly things. [[spoiler: In truth, Sarah has actually been riding around the country in black armor doing knightly things instead.]]
%%* TotallyRadical: Some of Calvin's dialogue.
* WarriorPrincess: [[spoiler: Princess Sarah is the true identity of the Black Knight.]]
* YeOldeButcheredeEnglishe: Used inconsistently. Arthur frequently speaks this way, but almost no one else in his entire court does.