[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/_images_ForbiddenZoneArt_home5.jpg]]
[[caption-width-right:300:You have been warned.]]

''Forbidden Zone'' is a [[MindScrew completely bonkers]] 1980 musical directed and written by Richard Elfman and Matthew Bright (who would later direct ''Film/{{Freeway}}''), created to be a last hurrah for his performance art troupe The Mystic Knights Of The Music/OingoBoingo before Elfman's brother [[Music/DannyElfman Danny]] reformed them as a successful [[NewWaveMusic New Wave]] and {{Ska}} band.

The movie's story focuses on a family that moves in a house that has in the basement a door to the sixth dimension that they pretty much try to ignore, but when the eldest daughter returns from her studies in France, curiosity attracts her to investigate. Heavily inspired by Music/CabCalloway, ''WesternAnimation/BettyBoop'' cartoons and UndergroundComics.

This movie is groundbreaking for being the first film that Music/DannyElfman ever composed a soundtrack for (no surprise considering his brother is the director and screenwriter, his brother's wife is the protagonist, and their father and grandfather both play characters in the film). Danny himself plays the devil while the rest of the original Oingo Boingo band (when it was known as ''The Mystic Knights of the Oingo Boingo'') are here as his minions. The film also includes a post-''Series/FantasyIsland'' Hervé Villechaize and pre-''Film/CryBaby'' Susan Tyrell.

The film had a ''huge'' influence on both Creator/TimBurton and Creator/PaulReubens, who first met while working on ''Film/PeeWeesBigAdventure''. The decision was quickly made to base much of their film's visuals on ''Forbidden Zone'', and to hire Music/DannyElfman to write the score. The rest is history.

A sequel is on its way: "Forbidden Zone 2: Forbidden Galaxy." Here's a [[http://www.youtube.com/watch?v=oi8lcJDlaVg trailer]]: the Princess (now Princess Polly) has apparently taken the helm and is taking the offensive to conquer Earth. Richard and Danny Elfman are both involved, as are Ego Plum and the crew from "Monster Man".

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!!''Film/ForbiddenZone'' includes examples of:
* AbusiveParents: Squeezit and Renee's parents.
** Considering Fausto and Doris are the parents of The Princess, they count.
* AdultsDressedAsChildren: All the children in the movie are played by adults.
* AllMenAreRapists / AllMenArePerverts / AllWomenAreLustful: ''So much''. The only truly chaste member of the cast is [[ButtMonkey Squeezit]], and even he's a little tempted by the Princess's come-ons.
* AmbiguousGender: Characters argue in universe whether René Henderson is a girl or a boy in drag.
* AssShove: The queen straps Frenchie to a table and attempts to give her "40,000 volts in her caboose" with an ''electrified dildo''! Yowtch!
* AstralProjection: Squeezit's mother beats him that badly, that he's able to leave his body and see his sister trapped in the sixth dimension.
* {{Atlantis}}: Ruins of Greek columns and a temple with the banner "Atlantis Dept. of Public Works" are seen underground in the initial animation.
* AwesomeMcCoolName: Flash Hercules.
* BadassGrandpa: More like "mentally disturbed, violent grandpa".
** HandicappedBadass: Screaming his head off at the opposition for so many years has made Gramps deaf and dumb (and, as a result, much harder to control when angry).
* BlackComedyRape
* {{Blackface}}: A character seen briefly at the start (and in a throwaway gag near the middle) is a slumlord and crack dealer played by a man in blackface; there are several others in bit parts throughout, done for [[RuleOfFunny comedic shock value]].
* BusbyBerkeleyNumber: Parodied.
* ChewToy: Squeezit to a ridiculous extent. Originally the scene when his father beats him while his mother laughs was going to be ten minutes long and the weird scene when he was going to say the Pledge of Allegiance actually was going to have him castrated.
* CloudCuckooLand: The sixth dimension. Reality isn't very normal in this film, though.
* CoolGate: The entrance to the sixth dimension looks like a mouth painted on the wall. The other end looks like a giant, black anus.
* CoverVersion: About a third of the songs are covers of 1930's songs, especially Music/CabCalloway ones.
** And later, Danny Elfman would create a [[SuspiciouslySimilarSong somewhat re-arranged version]] of the movie's title song to use as the opening theme for the TV show ''WesternAnimation/{{Dilbert}}''.
*** According to an interview later on, he said he had nothing to do with that, and was surprised to hear that they had done so.
* CreepyJazzMusic: The film has a moment when Elfman, as the Devil, kidnaps the hapless protagonist and orders him to kidnap a girl. All this is set to a key-changed and lyrically modified version of ''Minnie the Moocher'' called ''[[https://youtu.be/WACN2cdr4wc Squeezit the Moocher]]'' performed by The Mystic Knights of the Music/OingoBoingo as his imps. No, we didn't make that up.
* CrowdSong: Pico & Sepulveda, Queen's Revenge, The Alphabet Song and Finale.
* DealWithTheDevil: Squeezit [[spoiler:has to do one in order to save his sister and Frenchy]]
* DeliberatelyMonochrome: Well, maybe not deliberately. The director intended the black-and-white footage to be colorized by hand, but found it would be too costly to pull off; it's since been digitally colorized.
* DemBones: All over in the initial animation.
* DerangedAnimation: The intro and the sequences to the sixth dimension.
* DimensionLord: King Fausto rules the sixth dimension.
* DisneyVillainDeath: [[spoiler:Queen Doris]]
* DistantDuet: Queen's Revenge.
* [[DownTheRabbitHole Down The Butt Hole]]: The only way to reach to the sixth dimension
* DysfunctionalFamily
* DysfunctionJunction: The most normal character of the film is the wife-beating Norwegian-accented tarpit-working father.
* EarAche: The singer's ear is cut and eaten by the frog.
* EqualOpportunityOffender: Not a single ethnic group, gender or sexual orientation is presented positively in this film.
* EroticEating: Lampshaded and averted with a polish sausage.
* ForbiddenZone: In the title. It's another name for the sixth dimension and Frenchie's parents forbid her from going there.
* GalacticConqueror: [[spoiler:At the end of the movie, Fausto declares that he's going to take over the galaxy.]]
* TheGenieKnowsJackNicholson: The first person Gramps and Flash meet in the sixth dimension has read about Gramps' boxing career in the paper.
* GodSaveUsFromTheQueen
* GratuitousFrench: Susan B. 'Frenchy' Hercules.
* GroinAttack: The frog manservant gets this a ''lot''. [[MeaningfulName Naturally]], he's named "Bust Rod".
* HatOfFlight: Flash constantly wears a propeller beanie which he actually uses to fly the ex-queen out of her cell.
* HellGate: The portal in the basement. Squeezit meets the devil down there so the sixth dimension might actually be Hell.
* ImprobableHairstyle: Queen Doris
* InTheStyleOf: Fleischer Bros. and early Creator/WarnerBros cartoons.
** With a bit of Creator/MontyPython thrown in.
* JukeboxMusical
* LargeHam: Queen Doris of the sixth dimension.
* LittlePeopleAreSurreal: Invoked with Hervé Villechaize playing King Fausto.
* MindScrew
* TheMovie: Sort of. Richard Elfman conceived the film as a sort of "greatest hits" for the original Mystic Knights performance troupe once he decided to move on from it and become a filmmaker, at which point Danny would reform them as [[Music/OingoBoingo the now-famous rock band]]. Many scenes in the film were extracted from the troupe's live act.
* MsFanservice: The Princess. Oh, the Princess.
** FanserviceExtra: Peppered throughout the film are some other women, who are also topless.
** MrFanservice: Satan, by default of being the only guy in the cast who is neither dressed ridiculously or made up to look extremely ugly.
* NamedAfterSomebodyFamous: King Fausto and Susan B. Hercules.
* TheNapoleon: King Fausto.
* NoOSHACompliance: La Brea Tar Pit Factory.
* RefugeInAudacity
* {{Retraux}}
* RomanceOntheSet: Herve Villechaize and Susan Tyrell. No, really.
* ShoutOut: The whole Satan sequence is one on WesternAnimation/BettyBoop's ''WesternAnimation/MinnieTheMoocher'' cartoon, as well as "WesternAnimation/BimbosInitiation" (when Squeezit opens a door and gets punched in the face by a waiting boxer).
** The "Alphabet Song" is a reference to the classic Film/TheThreeStooges short "Violent is the Word for Curly" and its memorable song "Swingin' the Alphabet".
** Frenchy "sings" a Creator/JosephineBaker song, and Pa "sings" a Music/CabCalloway song.
* ShamelessFanserviceGirl: The Princess doesn't seem to be under any pressure to cover her breasts.
* SmallRoleBigImpact: Despite being prominently featured, Satan is only in the movie for one musical number, and doesn't have any speaking lines (all his lines are sung). [[spoiler:In said scene, he orders Squeezit to kidnap the Princess, which is what kicks off Fausto's HeelRealization.]]
* SoundtrackDissonance: Pa Hercules singing a joyful cover of ''Pico & Sepulveda'' with a chorus of men while going to their crappy job at La Brea Tar Pit Factory. With a little bit of LyricalDissonance thrown in: "Where nobody's dreams... come... true!"
* TheSpeechless: Gramps Hercules and Bust Rod.
* SpoiledBrat: The Princess, and to a lesser extent, Susan.
* StealthParody: WordOfGod says that the copious amounts of shameless racism was meant as a TakeThat towards supposedly-progressive Hollywood films made after the Civil Rights movement which still casted minorities in stereotypical roles. Richard Elfman felt that, if ''his'' movie was going to be offensive, he may as well not apologize.
* StockUnderwear: Aside from the mooks mentioned below (who wear jockstraps), everyone whose underwear is part of their costume wears tighty whiteys.
* SynchroVox: Used briefly during the "Bim Bam Boom" musical number; the young boy who played the Princess's "pet" successfully lip-synched the vocals in rehearsal, but became nervous and froze when cameras were rolling. Richard Elfman's solution was to loop usable footage from his spoiled performance (most evident when paying close attention to the Kipper Kids in the background, who are clearly moving forward then in reverse), and superimpose the lips of Matthew Bright, who played Squeezit. The visual style of the film is so bizarre that this odd scene just... works.
* TableSpace: The king and the queen, and a human chandelier over them.
* ThoseTwoGuys: The Kipper Kids, semi-famous performance artists who appear both in and out of the Sixth Dimension as a pair of grunting boxers and pug-nosed twin sisters, respectively.
* TitleDrop
* TwinTelepathy: The Henderson twins.
* UnexplainedRecovery: Johnny shoots Billy to death in the classroom for cheating at cards, and gets into a protracted gunfight with the teacher, who presumably kills him with the machine gun she keeps under her desk. Both of them still somehow come to class the next day.
* VillainSong: "Witch's Egg" and "Queen's Revenge" by Queen Doris and "Squeezit The Moocher" by the devil
** Amplified by the fact that the late Susan Tyrrell (who played Queen Doris) actually co-wrote "Witch's Egg".
* VomitIndiscretionShot: Gramps Hercules, at the lunch at the beginning of the movie.
* WackyHomeroom
* WardrobeMalfunction: The Queen's breasts are frequently popping out of he already too-small dress, albeit unintentionally.
* WatchItStoned: For some, the only way to understand ANY of it is to partake in it with some kind of outside influence...
* WeirdnessCensor: Do you have a gate to other dimensions in your basement? Just ignore it, and tie up Grandpa to make sure he doesn't fall in.
* WhaleEgg: The Queen sings about being born from a witch's egg.
* WhatKindOfLamePowerIsHeartAnyway: Squeezit can talk with chickens, which gives him the confidence to become a hero... well, [[DealWithTheDevil not without its consequences]].
** The chickens also pledge to help him any way they can - but, as everyone knows, chickens can't really ''do'' anything.
* WholesomeCrossdresser / DepravedHomosexual: Squeezit's "sister".
--> "The ''queen'' said she was going to ''ream'' us with ten-inch cattle prods... and ''I'm still waiting!''"
* WhoNamesTheirKidDude: Squeezit.
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