[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/innerspace-poster_9538.jpg]]

A 1987 sci-fi comedy starring Dennis Quaid, Martin Short and Meg Ryan.

Quaid plays Tuck Pendleton, a Navy pilot assigned to pilot an experimental submersible that is to be shrunk down and injected into a rabbit. Unfortunately, bad guys after the shrinking technology break into the lab, and one of the scientists, escaping with the syringe containing the shrunken sub with Pendleton in it, is forced to inject Pendleton into unwitting Safeway clerk Jack Putter.

''Then'' [[WhatDoYouMeanItWasntMadeOnDrugs things get weird]] (well, weird''er''). The film was directed by Creator/JoeDante and features special effects by Rob Bottin, which might help give you an idea of what you're in for.

Not to be confused with cult classic PC game ''VideoGame/OperationInnerSpace''
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!!Tropes used in this film:
* ActionSurvivor: Jack, to a "T."
* AdrenalineMakeover: Jack, again. A rare male example, and in the most literal sense possible. Tuck ''literally'' stimulates Jack's adrenal gland!
* AlmostOutOfOxygen: Tuck has a very limited supply of oxygen, so Jack must get him (and the chips) back to the lab before it runs out. A RaceAgainstTheClock begins.
* AndTheAdventureContinues: At the end of the film, a newly-empowered Jack sees [[spoiler: The Cowboy disguised as Tuck and Lydia's limo driver (with Scrimshaw and Dr. Canker hidden in the trunk, but Jack doesn't know it,)]] and chases after them.
* AppliedPhlebotinum: The whole plot [[MacGuffin revolves around]] retrieving the one-of-a-kind miniaturization/re-enlargement chips. Both projects have entire, working installations devoted to the miniaturization process, but for some reason even the villainous rivals need exactly the same chips as the government-funded laboratory.
** It's implied that Dr. Canker has been close enough to the other scientists to be able to get specs for most of the hardware, but that the chips are too new, experimental, and classified for her to have copied.
* ArtificialLimbs / SwissArmyAppendage: The assassin Mr. Igoe is missing his right hand, and has it replaced with a system of different swappable false hands, ranging from an ordinary cosmetic hand, to one with [[ScaramangaSpecial a pointing finger]] [[ArmCannon that is actually a gun]], to a [[ThisIsADrill drill-hand]].
** Even a juice dispenser.
*** In a scene where he finishes dinner with Dr. Canker, he replaces a fork attachment with... something else... that hums...
* AssholeVictim: [[spoiler: Mr. Igoe.]]
* AwesomeButImpractical: Using robot arms to place the chips. Lampshaded when an impatient scientist grabs the chip from the robot and puts it in manually.
* BigBad: Victor Scrimshaw.
* BondOneLiner: "Congratulations, Jack. You just ''digested'' the bad guy." Jack then burps.
* BrickJoke: "Who's the Cowboy?!" "That's, er, classified."
* CharacterDevelopment: Jack grows from a nerdy, cowardly hypochondriac to a man with a zest for adventure over the course of the movie.
* ChaseScene: Involving Tuck's Mustang chasing the refrigerated truck where Jack was held captive.
* ChekhovsGun: The Spinners' song "Cupid".
** Jack's allergy to hairspray.
* ComputerVoice: The computer aboard the...
* CoolShip: Tuck's minisub, reminiscent of the ''[[Film/TwoThousandOneASpaceOdyssey Discovery]]'''s space pods, and armed with an amazing array of gadgets and sensors. It even recognized Jack's human physiology immediately and auto-mapped it despite having been programmed to go into a ''rabbit''.
* CrouchingMoronHiddenBadass: Jack. Well, actually Tuck helped him a little...
* DareToBeBadass: Tuck gives a minor RousingSpeech to Jack when the latter is trapped in a refrigerator truck by Scrimshaw and Mr. Igoe. It works ''a little too well'', or, at least, a little too early -- the truck is still moving!
* DecoyProtagonist: Ozzie. He has an elaborate chase scene with the bad guys but eventually gets killed, right after pulling a silent ImDyingPleaseTakeMyMacGuffin to the real hero Jack.
* DepravedBisexual: The Cowboy seemed oddly... ''excited'' when Jack aggressively bursts into his hotel room while he's in his underwear. He even excitedly exclaims "Big Jack!"
* TheDragon: Mr Igoe.
* DreamingOfThingsToCome: Jack's dream about the old lady with a (cigarette lighter) gun and the high prices of her groceries.
* DrowningMySorrows: Tuck, a washed-out Naval Aviator, was already an alcoholic ''before'' Lydia dumped him, then he got worse. Although he claims to have sobered up before the miniaturization project, it's obvious to his coworkers that he's off the wagon (and also to the audience, judging by all the bottles he keeps stashed away in odd places in his apartment).
* EveryoneCallsHimBarkeep: The Cowboy, {{Badass}} master of industrial espionage, counterfeit, smuggling, and snakeskin clothing.
* EyeScream: Sort of. Tuck uses an electronic transmitter implanted into the clueless Jack's optical nerve to see what's going on. The problem is, installation of said transmitter is not exactly painless to Jack...
** Jack even describes that it feels like someone shot a hot needle through his eye. Before that, his eye starts twitching like crazy because Tuck's sub lands on the nerve behind his eyeball.
* ExactTimeToFailure: Tuck has a very limited supply of oxygen, so Jack must get him (and the chips) back to the lab before it runs out.
* ExplosiveDecompression: What would happen to the minisub if the cockpit were breached, which is why Tuck can't just go to the lungs to resupply his oxygen tanks.
** Also possibly a ShoutOut to the movie's ancestor, ''Film/FantasticVoyage'', where they did exactly that.
* {{Fainting}}: Scrimshaw's blond {{mook|s}} [[RunningGag keeps passing out]] amidst too much excitement.
* {{Fanservice}}: For the ladies [[HoYay and others]], a long glimpse at Dennis Quaid's bare ass.
* FantasticVoyagePlot: Self-explanatory. The effects are still awesome enough to be a deep well of {{Squick}} for some viewers.
* ForScience: What the original government project was intended for. The rival lab, on the other hand, has more lucrative goals in mind.
* GetAHoldOfYourselfMan: Jack gets slapped as he is having a psychotic breakdown behind the cash register.
* HeadphonesEqualIsolation: Mr. Igoe puts on his Walkman as he drives the truck Jack is imprisoned in. Naturally, he never even realizes he's involved in a ChaseScene.
* HearingVoices: Justified. Tuck communicates with his host via an electronic linkup in Jack's ear, and naturally Jack initially thinks he is insane when he hears Tuck's voice inside his head.
* HeelFaceTurn: Tuck's "friend" and government money man Pete Blanchard is quite the ruthless S.O.B. early in the film, willing to sacrifice Tuck's life to ensure the survival of Dr. Niles' project, but then randomly at the end turns up to personally chauffeur Jack back to Niles' lab to save Tuck.
** Though Pete thought of using both Tuck and Jack as bait to lure the robbers.
* HeroicSacrifice: Scientist Ozzie Wexler dies via a gunshot to the back whilst injecting Tuck into Jack.
* HollywoodAcid: Jack's stomach -- especially [[StrippedToTheBone what it does to]] [[spoiler:Mr. Igoe]] in the final battle. (Thanks a whole lot, Rob Bottin.)
* HotScientist / ThirdPersonSeductress: Margret Canker, ''and how''.
* HotScoop: Lydia.
* ImDyingPleaseTakeMyMacGuffin: After being shot, Ozzie uses the last of his strength to inject nearby passer-by Jack with the syringe containing the miniaturized submersible.
* [[IllGirl Ill Boy]]: Jack ''believes'' he is one of this. As it happens, he's the ultimate hypochondriac, to the point he might really give himself a heart-attack by stressing out over having a heart-attack.
* ImplacableMan: Mr. Igoe redefines the trope.
* ImprobablyCoolCar: Tuck's pristine red Mustang convertible.
* IntrepidReporter: Lydia, Tuck's girlfriend.
* JerkWithAHeartOfGold: Tuck. Pompous and alcoholic but if you need him he can help you and give you good advices.
* LatexPerfection: Thanks to the little guy inside you who can stimulate your facial nerves ''just'' so. ([[PanderingToTheBase Real reason]]: because every Joe Dante movie needs a TransformationSequence, that's why.)
* LockedInAFreezer: Jack is trapped in a meat truck at freezing temperature.
* LoveTriangle: More or less. Jack is attracted to Lydia who still loves Tuck but has some minor affection for Jack, as evidenced by still wanting to kiss Jack after Jack asks Tuck to shut down and the lingering glance at Jack before she gets in the limo ''at her wedding''.
* MadScientist: Dr. Canker. With a touch of MadDoctor.
** Also Dr. Niles. Dr. Canker is sort of his DistaffCounterpart.
* MagicFeather: Jack, when he thinks Tuck is still inside him and feeding him doses of adrenaline, rescues Lydia bravely.
** Amusingly (and a little dishearteningly), when he learns the truth, he instantly becomes a nebbish again.
** Not really. He does have an OhCrap, but he still knocks the mook out - and then the NoEnding ending...
* MayDecemberRomance: Implied with [[spoiler: Wendy and Dr. Greenbush after Jack ditches her]].
* MiniatureSeniorCitizens: The villain couple getting miniaturized.
* MisappliedPhlebotinum: The miniaturization process is described as "breaking an object down to its component particles to 'compile' a microscopic version of the object". The first part would be called "destructive uploading", and is actually being seriously researched both for machines and people (there are ethical concerns for people, as even if you can perfectly reconstruct the human, it's still essentially murder by perfect [[DisposingOfABody body disposal]], but it's a secret government project doing it meaning ScrewTheRulesIMakeThem). But if they can "compile" Tuck as a human the size of an amoeba while retaining his intelligence, ''then they have a computer chip that makes the NSA's best stuff as of 2012 look like an abacus.'' [[FridgeBrilliance You'd need that kind of processing power to upload stuff]], but that's civilization-changing technology. And they're using it, with NoPlansNoPrototypeNoBackup, on a ''rabbit'', as a precursor to fitting people with sensory-jacking surveillance equipment. ReedRichardsIsUseless.
** Although the computer display uses the term "compiling" its probably more akin to the compression used on files in a computer, where much data (or mass) is discarded & only the most important information is retained. Scrimshaw does also note to Jack in the Freezer Truck that Miniaturization has much more potential than the Nuclear Arms or Space race.
* MultitaskedConversation: Confusing talk in the hospital, when Tuck (inside Jack) tries to talk to Jack who believes some patients are talking to him.
* MundaneMadeAwesome: Thanks to Joe Dante, DP Andrew Lazlo, and the late Jerry Goldsmith, a glass full of ice (which Tuck will end up drinking from) becomes a mysterious background for the film's title card.
* MySecretPregnancy: [[spoiler:Lydia, who keeps it from Tuck. The thing is, when he found out (in the ''weirdest'' way possible, mind you), he was crying tears of joy]].
** [[spoiler:[[CallBack Referenced again]] at the end. Tuck's first words to Lydia after being returned to normal were, "Why didn't you tell me?"]]
* NamesToRunAwayFromReallyFast: Again, Dr. ''Canker''.
* NoEnding: "Jack Putter to the rescue!"
* NoPlansNoPrototypeNoBackup: The chips. {{Lampshade|Hanging}}d. They're one-of-a-kind, nobody can replicate them or their technology, and nobody made backups in case they were lost or damaged.
* NoodleIncident: Something must have happened between Ozzie Wexler and Dr. Canker.
* PairTheSpares: Wendy and Dr Greenbush share a longing glance at the end.
* PintSizedPowerhouse: Scrimshaw and Dr. Canker, after [[spoiler:getting shrunk down to midget size]].
* PreMortemOneLiner:
-->'''Tuck:''' Okay, buddy, let me show you how I spell 'relief'!"
** Tuck's delivery makes it [[SugarWiki/MomentOfAwesome pretty damn sweet]] though, [[SugarWiki/AwesomeMusic as does the score.]]
* RaceAgainstTheClock: To rescue Tuck, who is AlmostOutOfOxygen.
* ReasonableAuthorityFigure: Project leader Dr. David Niles is rather likable and understanding for a gub'mint scientist.
** He's kind of weird and borders on MadScientist, though.
* RightManInTheWrongPlace: Jack, becoming the UnlikelyHero of the story by being at the wrong place at the wrong time.
* RunningGag: The Cowboy - he's classified.
* UsefulNotes/SanFrancisco: The main setting of the movie.
* ShoutOut: ''Literature/AliceInWonderland''. Though why anyone would set up the miniaturization/re-enlargement process selection screen that way is anyone's guess.
** Also, ''2001: A Space Odyssey'', in the aforementioned design of the pod. And the... ''unusual'' way Tuck meets [[spoiler: his child]] for the first time.
** There's plenty of LooneyTunes references, including a cameo by ChuckJones in the grocery store scene.
* SomethingOnlyTheyWouldSay: The way Jack convinces Lydia that Tuck really ''is'' miniaturized.
-->'''Jack:''' ''(repeating Tuck)'' "I don't blame you for walking out on me that morning. But it was my heart that was broken, not my toe."
* SoulSuckingRetailJob: Jack's position in the beginning. [[spoiler: He quits after deciding he prefers a life of adventure and intrigue]].
* StaringKid: There's one when Mr. Igoe shoots Ozzie with his gun hand.
* StunGuns: Lydia tries to use one on Mr. Igoe. It backfires horribly.
* TechnoBabble: The miniaturization process in the film is depicted as breaking up a macroscale object into its component molecules to "compile" a microscopic version of that object. The loss of so much of the objects mass is presumably the reason why Niles described the re-enlargement process as "tricky" & why two chips are used - one on the pod, one on the miniaturizer - as they can serve as a guide for exactly how to rebuild the object. So they're using a variation of [[Film/{{Tron}} Encom's scanning laser]].
* ThereAreNoPolice: When Ozzie is running from Igoe in the mall, he is not looking for a security guard or yelling for help or going into a store and telling them to call 911. This would be an obvious RealLife course of action to take - however the [[TropesAretools trope is necessary]] to get Tuck injected into Jack.
* ThreeAmigos: Tuck, Jack, and Lydia, in a sense.
* ToAbsentFriends: "We're going to make a toast to Ozzie, who saved my ass by injecting me into yours."
* TookALevelInBadass: Jack, oh so [[SugarWiki/MomentOfAwesome amazingly]].
* TravelingAtTheSpeedOfPlot: Despite 60,000 miles of blood vessels in the human body, forming a huge maze that goes through the heart every minute, Tuck manages to make his way around a human body pretty quick - ear, eye, abdomen, stomach, mouth. Zip-zip-zip.
* UnlikelyHero: Jack, being the RightManInTheWrongPlace.
* VanityLicensePlate: Igoe's BMW ("SNAPON") and Scrimshaw's Rolls-Royce ("SUB-ZRO").
* TheVoice: Tuck is this from Jack's perspective.
* TheVoiceless: Igoe never says a word in the entire film. Unless you count, "Arrrrrggggh!"
* WhatHappenedToTheMouse: By the end of the movie, all of the sensors Tuck implanted on Jack's body (and Mr. Igoe's damaged pod [[spoiler:and Mr. Igoe's remains]]) are still in there. Doesn't seem to bother anyone.
** If I know anything about how the body works, Jack's body would probably get rid of the sensors. And [[FridgeHorror we all know where Mr. Igoe]] [[{{Squick}} will end up]].
*** Eh, [[JustForPun he was a piece of shit anyway]].
** What happened to the scientists who were in the miniaturization chamber with Scrimshaw and Kanker?
* WhenThingsSpinScienceHappens: The miniaturization process at the government lab spins Tuck's minisub at absurdly high rates before breaking it down and shrinking it. It's a wonder Tuck's stomach didn't object.
** Judging by the look on his face at the time, he probably ''was'' feeling pretty queasy; he just managed to hold it together. Until he passed out from the centrifugal force, that is.
** This explains why a borderline-alcoholic Navy pilot was used in the experiment - he probably was ineligible for flight privileges, but still could take the high-gee spinning better than an ordinary person.
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