* AccidentallyAccurate:
** In the "Petting Zoo" short, Octavia the eight-legged cow [[http://scienceblogs.com/tetrapodzoology/2010/12/20/carnivory-in-cows-and-deer/ kills and eats a bird]].
** Mabel when flirting with (Austrian) Baron Marius in "Northwest Mansion Mystery" mistakenly thinks he's from Australia and asks if they eat kangaroos or keep them as pets. [[http://www.bbc.com/news/magazine-23086541 As a matter of fact . . .]]
* ActingForTwo: Sev'ral Timez consists of five characters, but are voiced by three actors. You try to sort it out.
* ActorAllusion:
** Creator/BrianBloom is no stranger to voicing characters in ''Street Fighter''-type fighting games; he played Comicbook/CaptainAmerica in ''VideoGame/MarvelVsCapcom3''.
** This isn't the first time Creator/JeffBennett voiced a [[JustForFun/CandleJack super creepy character]].
** Also, Giffany isn't the first superpowered {{Yandere}} Jessica [=DiCicco=] [[WesternAnimation/AdventureTime has played]].
** [[Music/{{NSYNC}} Lance Bass]] knows a thing or two about being in boy bands. One of the clones even does *NSYNC's signature "Bye Bye Bye" move.
** Alex Hirsch's sister Ariel has a voice cameo in "Boyz Crazy," as a crazy fan of Sev'ral Timez, which, according to Alex, was how she was with NSYNC (and Lance Bass in particular, who voiced one of the band members in this episode).
** In Blendin's Game, Blendin Blandin tells Lolph and Dundgren that he will continue stammering until the twins are found. The voice actor, Justin Roiland, voices the title characters of WesternAnimation/RickAndMorty, two characters that stammer a lot.
** In ''Carpet Diem'', Niki Yang's character, Candy Chiu, observes that someone "has the [[WesternAnimation/AdventureTime voice of a robot]]."
* ChannelHop: Season 2's episodes and onwards will premiere on Creator/DisneyXD, and sadly, [[BadExportForYou the XD version has the]] CreditsPushback. No more decoding for you!
** Luckily, the same episodes air on Creator/DisneyChannel as part of their "Disney XD on Disney Channel" block, so decoding will continue.
* CreatorCameo:
** Alex Hirsch voices both Grunkle Stan and Soos.
*** As well as Old Man [=McGucket=], Quentin Trembley, the gnomes, several of the members of Sev'ral Timez and Bill Cipher.
** Former writer/creative director Michael Rianda voices Lee, Thompson and Mr. Poolcheck.
* CrossDressingVoices: Grenda is voiced by Carl Faruolo.
** Grunkle Stan also momentarily sounds like a woman after accidentally drinking voice-altering tonic.
* DawsonCasting: 12-year old Dipper is voiced by Jason Ritter, who's in his mid-thirties, same with his twin sister Mabel who's voiced by Creator/KristenSchaal.
** Wendy is voiced by Linda Cardellini, who's in her late thirties.
** Inverted with 60-year old Stan. He is voiced by the [[CreatorCameo creator]], who's in his late twenties. He's also voiced other old people like Old Man [=McGucket=] and President Trembley.
** Pretty much any kid on the show, who's around Dipper's and Mabel's age, are voiced by adults, same with the teenagers.
* DescendedCreator: Alex Hirsch does the voice of both Stan and Soos, as well as recurring characters like Old Man [=McGucket=], President Trembley and Bill Cipher.
* FanCommunityNickname: Tumblr Fans of the show are called Fallers.
* FanNickname: [[spoiler: [[EldritchAbomination Bill Cipher]]]] was known as "Mr. Pyramid" and "ACE" before being properly introduced.
** Some also call him a "Magical Dorito", or [[TheIlluminati "The Illuminacho"]].
** Fans of ''WesternAnimation/TotalDrama'' would consider "Boyz Crazy" (a season 1 episode where Wendy dumps Robbie) the sequel to ''[[WesternAnimation/TotalDrama Greece's Pieces]]".
*** Similarly, ''WesternAnimation/EdEddNEddy'' can consider "Northwest Manor Noir" a SpiritualSuccessor to ''WesternAnimation/EdEddNEddysBigPictureShow'', since they both have [[spoiler: TheReveal that a major {{Jerkass}} character had a child abuse-related FreudianExcuse.]]
** Some have taken to calling Pacifica, "Paz". "Ciffy" and "Pacy" aren't uncommon either.
** With TheReveal concerning [[spoiler: The Author AND a confirmation of the [[IKnewIt "Stan has a twin" theory]], people have taken to calling the Author "Author Stan" or "Stanley", which is the most commonly theorized name for Stan's twin.]]
** [[spoiler: It's also tied into IKnewIt, but when the theories for who the Author was were still rolling around, the internet took to calling Stan and his brother "Mystery Twins Classic."]]
* HeyItsThatVoice: [[HeyItsThatVoice/GravityFalls Has its own page now]]!
* IKnewIt:
** "Gideon Rises":[[spoiler:Stan has Book 1 and he is aware of the crazy supernatural stuff that happens in town but lies about it]].
** "Into the Bunker": Wendy [[spoiler: knows about Dipper's crush on her.]] and [[spoiler: The author of the books has 6 fingers.]].
** "Scaryoke": [[spoiler: Soos becomes a zombie.]]
** "Society of the Blind Eye": [[spoiler: Old Man [=McGucket=] was intimately involved with the mysteries of Gravity Falls before he went crazy -- though he turned out ''not'' to be the author of the journals, as everyone assumed, but merely the true author's lab assistant.]]
** "Not What He Seems": [[spoiler: The author of the books is Stan's brother and Stan was trying to use the machine to bring him back. This one is particular is the culmination of the infamous "Stanley" or "Stan's Twin" theory, which was very well known but often a hot subject of debate.]]
* {{Jossed}}: Before [[spoiler: Bill Cipher]] was revealed as a character, some fans guessed that [[spoiler: the triangle at the end of the theme song was just there for show and would have no in-show significance. Oh, how wrong were they.]]
** [[spoiler: Old Man [=McGucket=] is not the author of the journals.]]
** Aside that those are all common Judaic expressions, the Pines aren't Jewish (or any other religion, canonically).
* ManOfAThousandVoices: Alex Hirsch voices at least five different characters in the show, and they all have their own distinct voice.
** More specifically, he voices: Stan, Soos, the gnomes, Bill Cipher, Quentin Trembley, Old Man [=McGucket=], Norman, Paper Jam Dipper, and additional background characters, including Mayor Befufftlefumpter, ancient and reclusive mayor of Gravity Falls.
** Music/GreyDeLisle also voices many incidental characters on the show, some of the most notable being Mrs. Gleeful in "Little Dipper," the Summerween Superstore clerk and Gorney in "Summerween," Grunkle Stan's new voice in "Bottomless Pit," and the woman who asks Soos for directions and ends up falling in love with him in "Carpet Diem."
* NamesTheSame: Same company example: The Lamby Lamby Dance in the episode, "The Inconveniencing", shares its name with a character on Disney Junior's ''WesternAnimation/DocMcStuffins''.
* OldShame: Alex Hirsch is, according to a [[http://www.reddit.com/r/gravityfalls/comments/1kgq85/i_am_alex_hirsch_creator_of_gravity_falls_ask_me/cbosezb?context=3 reddit thread]], not terribly fond of the 11-minute pilot used to pitch the show.
-->"Any chance we'll see the full unaired pilot at some point in the future?"
-->"Oh lord I hope not. That thing was a mess, haha! That would be like showing you awkward photos from my high school prom. We all have dark horrible secrets. That 11 minute Flash pilot was mine."
* OneOfUs: Someone working on the show is madly in love with ''Franchise/StreetFighter''. And ''VideoGame/SuperMarioBros2''. And ''VideoGame/PacMan''.
** Also, certain tropes in this site are sometimes dropped in episodes and on staff comments.
* TheOtherDarrin: Strangely enough, in a commercial for Gravity Falls mealbags at Subway, Kristen Schaal does not voice Mabel. Even stranger, all of the dialogue for the twins in that CM is taken from clips of previous episodes, and they didn't dub over Jason Ritter's voice for Dipper. Maybe Kristen Schaal just doesn't like Subway.
** Creator/NathanFillion voices Preston Northwest in season 2 while another actor voiced him in "Irrational Treasure".
* PromotedFanboy: Emmy Cicierega (sister of Creator/NeilCicierega), who has done [[http://emmyc.tumblr.com/tagged/gravity-falls fanart]] for the show, [[https://twitter.com/EmmyCic/status/418164421564055552 now works on the show as a storyboard artist.]]
** Alex Hirsch himself is a big fan of WebAnimation/HomestarRunner. He openly admits working/being friends with the site's creator, Matt Chapman is a dream come true.
* RelationshipVoiceActor:
** A good amount of the cast is a mini ''WesternAnimation/AdventureTime'' reunion: Candy is BMO and Lady Rainicorn, Mabel is Jake Jr., Blendin Blandin and Bobby Renzobbi are Lemongrab, Pacifica is Susan Strong, Tambry is Flame Princess, [[Creator/JohnDiMaggio Manly Dan]] is Jake, [[Creator/JeffBennett the Summerween Trickster]] is Choose Goose, [[Creator/DeeBradleyBaker Waddles]] is Cinnamon Bun, and [[Creator/StephenRoot Bud Gleeful]] is Martin.
* ScheduleSlip: For some unexplained reason there are a lot of long delays between episodes in the US.
** Alex Hirsch learned his lesson from when it happened in Season 1, and constructed Season 2 more like two mini-seasons of ten episodes, suspecting correctly that there would be a huge hiatus at that point.
* TalkingToHimself: Grunkle Stan and Soos.
** Literally in the episode "Double Dipper" with Dipper and all his clones.
* TrollingCreator: Alex Hirsch is the current page image for the trope, with [[https://twitter.com/_AlexHirsch/status/536054960018825217 This]] being the most infamous example of his shenanigans.
* UrbanLegendOfZelda: There is a picture circulating the Internet of [[Franchise/TheSlenderManMythos the Slender Man]] watching Dipper and Mabel from the background in one of the episodes. This is not the case; viewing the episode itself yields no Slender Man.
* WhatCouldHaveBeen:
** [[http://superpunch.blogspot.com/2012/06/gravity-falls-concept-art.html The early concept art]] shows several possible designs for the characters.
** Creator/NeilCicierega composed [[http://neilcicierega.tumblr.com/tagged/gravity-falls two unused themes]] for the show.
** There was going to be an episode based on the David Bowie film ''Film/{{Labyrinth}}''. Mabel would love the movie, but Dipper would hate it due to a fear of puppets. Dipper wouldn't admit to being afraid of the puppet; he would just call the movie dumb. Mabel would summon the Goblins to take Dipper away so she could watch the film. The Goblins would come out of the film take Dipper to the Labyrinth. [[{{David Bowie}} The Goblin King]] would try to get Mabel to go through the labyrinth to find Dipper, but Mabel would instead want to spend time with the Goblin King. The episode would end with Dipper admitting his fear of puppets. [[{{ExecutiveMeddling}} The episode wasn't made because the studio execs]] [[{{ViewersAreMorons}} didn't think the audence would get the reference]], but they still managed to sneak a ''Labyrinth'' reference into one of the "Mabel's Guide to Life" shorts (where Mabel, Grenda and Candy dress Soos up as the Goblin King for one of their "flash makeovers").
** Alex Hirsch wanted Creator/BobOdenkirk to play Stan but [[https://twitter.com/_AlexHirsch/status/373275648136998912 he turned the offer down.]]
** The music for the [[https://www.youtube.com/watch?v=CQSLFBfZXF0 SDCC trailer]] was originally composed as an alternate theme song, according to the Gravity Falls team's [[http://gravi-teamfalls.tumblr.com/post/93948638918/the-full-theme-from-our-s2-trailer-originally tumblr]].
** Hirsch wanted Creator/DavidLynch to play Bill Cipher but, as Odenkirk, [[https://twitter.com/_AlexHirsch/status/515689891334987776 he declined.]]
** [[http://arythusa.tumblr.com/post/104366869577/gravity-falls-the-love-god-intro In the storyboards for "The Love God"]] the Love God originally hooked the old lady up [[HoYay with another old lady]]. His necklace also originally included the symbol for transgender/genderqueer as well as the traditional male and female symbols.
** [[Creator/DannyDeVito Danny [=DeVito=]]] also [[https://twitter.com/_AlexHirsch/status/566480600609992705 turned down a role in the show.]]
* WordOfGod: Alex Hirsch, for all intents and purposes, is incredibly young to be the creator and show-runner of a Disney animated TV series, and frequently connects with his fans while answering questions on his [[https://twitter.com/_AlexHirsch Twitter feed]], and is into a lot of the same nostalgic things from the same time periods of the fans.
** Wendy's last name is Corduroy. And her middle name is Blerble.
** Dipper, Mabel and Stan's eyes are brown (Mabel's green eyes in "The Inconviniencing" are implied to be a result of overdosing on Smile Dip), Wendy's are green, and Li'l Gideon's are blue. As for Soos? "It's a mystery, dude!"
** Mabel is the older of the twins by 5 minutes.
** Hirsch describes the show as ''Series/TwinPeaks'' meets ''WesternAnimation/TheSimpsons''.
* WorkingTitle: "Northwest Mansion Mystery" was first announced as "Northwest Mansion Noir".
* WriteWhatYouKnow: Alex Hirsch based the series on the childhood summers he and his twin sister spent camping with their great-aunt.
* WriteWhoYouKnow: Dipper is based on Alex Hirsch himself and each of the other main characters on people he knows. Mabel is based on Hirsch's twin sister Ariel, Grunkle Stan on their Grandpa Stan, Soos on Hirsch's one-time roommate Jesus and Wendy on a girl he had a crush on in his youth.
** Wendy's list of ex-boyfriends [[http://ariel-is-mabel.tumblr.com/post/41441015383/instead-of-doing-ask-ariel-today-im-doing uses the names of real people]] Ariel Hirsch had crushes on.
* Misc:
** The location of Gravity Falls: post card in the first episode puts Gravity Falls almost dead center of the state, Then the dot on the map in Scary-okey put the location around Malhuer National Forest.