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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.Thenthings get weird (well, weirder). The film was directed by Joe Dante 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 Operation Inner Space
And the Adventure Continues: At the end of the film, a newly-empowered Jack sees 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.
Applied Phlebotinum: The whole plot 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.
Cool Ship: Tuck's minisub, reminiscent of the 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.
Dare to Be Badass: Tuck gives a minor Rousing Speech 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!
Drowning My Sorrows: 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).
Eye Scream: 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.
Exact Time to Failure: Tuck has a very limited supply of oxygen, so Jack must get him (and the chips) back to the lab before it runs out.
Explosive Decompression: 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.
Hearing Voices: 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.
Heel-Face Turn: 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.
Heroic Sacrifice: Scientist Ozzie Wexler dies via a gunshot to the back whilst injecting Tuck into Jack.
Love Triangle: 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.
Misapplied Phlebotinum: 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 body disposal, but it's a secret government project doing it meaning Screw the Rules, I Make Them!). 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.You'd need that kind of processing power to upload stuff, but that's civilization-changing technology. And they're using it, with No Plans, No Prototype, No Backup, on a rabbit, as a precursor to fitting people with sensory-jacking surveillance equipment. Reed Richards Is Useless.
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.
Multitasked Conversation: Confusing talk in the hospital, when Tuck (inside Jack) tries to talk to Jack who believes some patients are talking to him.
Mundane Made Awesome: 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.
My Secret Pregnancy: 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.
Referenced again at the end. Tuck's first words to Lydia after being returned to normal were, "Why didn't you tell me?"
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."
Soul-Sucking Retail Job: Jack's position in the beginning. He quits after deciding he prefers a life of adventure and intrigue.
Staring Kid: There's one when Mr. Igoe shoots a scientist with his gun hand.
Stun Guns: Lydia tries to use one on Mr. Igoe. It backfires horribly.
Techno Babble: 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 the administrator (Dr 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 Encom's scanning laser.
There Are No Police: When the scientist with the syringe is running from Mr. 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 Real Life course of action to take - however the trope is necessary to get Tuck injected into Jack.
Traveling at the Speed of Plot: 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.
The Voiceless: Igoe never says a word in the entire film. Unless you count, "Arrrrrggggh!"
What Happened to the Mouse?: By the end of the movie, all of the sensors Tuck implanted on Jack's body (and Mr. Igoe's damaged pod and Mr. Igoe's remains) are still in there. Doesn't seem to bother anyone.
What happened to the scientists who were in the miniaturization chamber with Scrimshaw and Kanker?
When Things Spin, Science Happens: 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.