History ShoutOut / HarryPotterAndTheMethodsofRationality

** Harry says he would evacuate all the wizards to Mars should a war break out between wizards and Muggles. Guess where the magic world in ''[[Manga/MahouSenseiNegima Negima]]'' is.

** In their duel, Mad-Eye Moody wordlessly fires seventeen [[Manga/MahouSenseiNegima Sagitta Magica]] to take down one of Harry's cloaked Time-Turned selves.

** According to Quirrell, a nineteenth-century dark witch, who called herself the [[Manga/MahouSenseiNegima Dark Evangel and was known to Aurors as A.K. McDowell]], could cast the Killing Curse a dozen times in one fight.

** Quirrell mentions using the Blood Fort sacrifce, a reference to Rider's Noble Phantasm in ''[[VisualNovel/FateStayNight Fate/Stay Night]]''.

** Alastor mentions the name of Sirius Black's mother as Walpurga, suspiciously similar to the witch Walpurgisnacht from [[Anime/PuellaMagiMadokaMagica Madoka Magicka]]. As Walpurgisnacht is the name of the annual meeting of witches in german folklore it might also be in regards to that.
*** Oddly enough, her canonical name was Walburga, according to Rowling's [[https://www.hp-lexicon.org/source/other-canon/bft/ Black Family Tree]], but her husband's name was Orion, not Pollux, as HPMOR has it. It's possible that Yudkowsky didn't look at the BFT, and got the name indirectly (possibly including the misspelling) from some other fan-fic written by someone who had, which only mentioned her by name and not Orion.

** Harry sees a [[{{Lensman}} Zabriskan Fontema]] and a [[Webcomic/UserFriendly large dust ball with eyes and feet]] preserved in jars in the Potions dungeon.

** [[ThisMeansWar "Of course you realize this means war."]]

** Dumbledore apparently owns a [[Literature/{{Lensman}} Lens of Civilization]], the HolyGrail (specifically, the version of it featured in ''Film/IndianaJonesAndTheLastCrusade''), and the [[Film/TheMalteseFalcon Maltese Falcon]].

** A reference to the Ministry passing a marriage law is likely a reference to the Marriage Law challenge which has spawned a whole category of Hermione/Snape fanfiction. It generally involves the Ministry banning pureblood marriages, to improve the gene pool, and allowing purebloods to force muggleborns into marriage arrangements.

** The [[RomeoAndJuliet Montagues]] -- Montague is likewise the name of one of the Slytherin quidditch players in canon, so if it's a shout-out, it's more likely attributable to J. K. Rowling than to Eliezer Yudkowsky.

** Daphne's title Greengrass of... Frolicking Woodland Creatures is allusion to [[WebAnimation/HappyTreeFriends Happy Tree Friends]][[note]]possibly a RecursiveTranslation of the German version of the show's title, "Fröhliche Baumfreunde"[[/note]] and Sparkly Unicorn Princess is to, [[Main/CaptainObvious well,]] [[WesternAnimation/MyLittlePonyFriendshipIsMagic sparkly unicorn princesses]]. "Sparklypoo" is a reference to a famous fan comic in which this fifth house of Hogwarts existed to hold all of the over-the-top MarySue fan characters.

** Like her original first-year exams, Hermione got [[spoiler: Professor Quirrell]] [[HarryPotterAndTheSorcerersStone one hundred and twelve percent]] right.

* Chapter 108: The Defense Professor is [[Theatre/AVeryPotterMusical a particularly good finder]].
* Chapter 108: Dark Evangel is recalled as having a particularly embarrassing debut as the [[FanFic/MyImmortal Apostrophe of Darkness]].

** The "golden pathway" that Harry sees stretching into the future is similar to [[Literature/ChildrenOfDune Leto Atreides II's]] political agenda, whose purpose also was to ensure the survival of humanity.

* The spell Minerva uses on her, 'Eunoe', is a reference to the titular river in Dante's Comedia. The river Lethe is said to cleanse one's memories, whereas Eunoe is said to restore one's positive memories.

** Like her original first-year exams, Hermione got [[spoiler: Professor Quirrell]] [[HarryPotterAndThePhilosophersStone one hundred and twelve percent]] right.

** According to the [[Main/WordOfGod Voice of God]], the line "And then Janet was a Squib" was not intended to be a reference to the last line of ''Fanfic/DoomRepercussionsOfEvil'' but it's an amusing coincidence nevertheless.

** "[[Warhammer40000ChaosMarines Blood for the blood god! Skulls for J. K. Rowling!]]"

** Harry's password includes the Marx brothers' "[[ThePasswordIsAlwaysSwordfish Swordfish]]," "[[Literature/TheLordOfTheRings friend]]" from the ''Lord of the Rings'', and "[[Literature/TheLordOfTheRings melon]]," the Elvish word for "friend."

** Harry's phrasing when talking to Hermione about [[spoiler:whether or not they'll ultimately fall in love]] evokes Creator/BazLuhrmann's song "[[http://www.metrolyrics.com/everybodys-free-to-wear-sunscreen-lyrics-baz-luhrmann.html Everybody's Free (To Wear Sunscreen)]]," and he manages to mention that he isn't wearing sunscreen himself.

** [[Recap/SouthParkS5E4ScottTenormanMustDie Tenorman's family chili]] and [[Film/SoylentGreen green lentil soup]] (served with [[AGlassOfChianti a glass of]] ''[[TheSilenceOfTheLambs Chianti]]'', natch).

** "[[CthulhuMythos ph'nglui mglw'nafh J. K. Rowling wgah'nagl fhtagn]]"

** Harry wrote the above chant to imply the ritual sacrifice of the [[CthulhuMythos Outer God, Yog-Sothoth]].

** The kinds of aliens Harry suggests to Draco that humanity might eventually encounter resemble two species that humans run into in EY's novella ThreeWorldsCollide.

** ''SugarWiki/RobotUnicornAttack''

** RobotUnicornAttack

* Chapter 105 has Quirrell mention that the [[spoiler:the Philosopher's Stone can perform human Transfiguration]]; another nod to FullmetalAlchemist and its version.

** The incantation for the above spell can be translated as "[[WesternAnimation/ThunderCats1985 Thunder]]! [[WesternAnimation/HeManAndTheMastersOfTheUniverse1983 Gray skull]]! [[http://tvtropes.org/pmwiki/pmwiki.php/Anime/Voltron Blazing Sword]]!"

** According to the [[Main/WordOfGod Voice of God]], the line "And then Janet was a Squib" was not intended to be a reference to the last line of ''DoomRepercussionsOfEvil'' but it's an amusing coincidence nevertheless.

** "[[Warhammer40000ChaosMarines Blood for the blood nicolas cage! Skulls for J. K. Rowling!]]"

** According to the [[Main/WordOfGod Voice of Nicolas Cage]], the line "And then Janet was a Squib" was not intended to be a reference to the last line of ''DoomRepercussionsOfEvil'' but it's an amusing coincidence nevertheless.

** Harry wrote the above chant to imply the ritual sacrifice of the [[CthulhuMythos Outer Nicolas Cage, Yog-Sothoth]].

** "[[Warhammer40000ChaosMarines Blood for the blood god! Skulls for J. K. Rowling!]]"

** According to the [[Main/WordOfGod Voice of God]], the line "And then Janet was a Squib" was not intended to be a reference to the last line of ''DoomRepercussionsOfEvil'' but it's an amusing coincidence nevertheless.

** Harry wrote the above chant to imply the ritual sacrifice of the [[CthulhuMythos Outer God, Yog-Sothoth]].