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[[quoteright:350:[[Webcomic/{{Freefall}} http://static.tvtropes.org/pmwiki/pub/images/rsz_fc02123_8268.png]]]]
[[caption-width-right:350:[[Literature/TheReturnOfTheKing But today shall not be that day]].]]

->''"Covered with towels? Ack! My instincts are showing. I just buried a Tupperware bowl."''
-->-- '''[[http://freefall.purrsia.com/ff700/fv00612.htm Florence Ambrose]]''', ''Webcomic/{{Freefall}}''

A non-human character tries to live amongst humans. Or maybe a human character is made [[HalfHumanHybrid half-non-human]]. He does a good job of hiding his non-humanness, but occasionally his species's normal (and non-human) behavior comes out.

[[TransformationCauses Whatever the reason for a transformation]] may be, this is almost guaranteed to happen during or after {{shapeshifting}}. This may include food preferences unusual for their current form or other [[AnimalStereotypes stereotypical behavior]].

In cases of shapeshifting, it's similar to TheMindIsAPlaythingOfTheBody. For non-shapeshifting cases, it's similar to FeeFiFauxPas. Compare also with FurryReminder.

Humans are not completely exempt, though these occasions are often solely limited to life-or-death situations where the pressure regresses the mental state to a fight-or-flight mindset; focus on surviving, and survive at any cost.



[[folder: Anime & Manga ]]

* Very common in the ''Manga/{{Beastars}}'' universe. From the benign (tails wagging when happy) to the dangerous (carnivorous urges).
* Happens a few times to Katy in ''The Fantastic Adventures of Manga/{{Unico}}'' when she [[HumanityEnsues gets turned into a human girl]], leading to her trying to chase bugs or wash herself with the back of her hand.
* ''Manga/FullmetalAlchemist'':
** Greed's chimeras are subject to this, most notably Martel, the snake girl. One of the funnier moments involving them has Martel comment that Dolcetto, who's part dog, lifts up one leg to pee.
** Later, when Heinkel (a lion chimera) is fighting Pride, Pride notes that Heinkel isn't even hesitating to attack someone who looks like a little boy. Heinkel says that his animal instincts are screaming at him to kill the "boy" before he gets killed first.
* One of the ''Manga/{{Inuyasha}}'' movies has the title character fetching a stick. He'll also occasionally scratch behind his ear with one of his feet while sitting down.
* Satsuki, the werewolf in ''Manga/MillenniumSnow'', actually fetches a stick thrown by another character.
* In ''Manga/TokyoMewMew'', Ichigo gets infused with feline DNA and suddenly finds herself snatching fish in her teeth.
** She also takes cat naps, much to her distress, especially when it happens in class.
* Animals turned human or humanoid in ''Anime/PrincessTutu'' usually act like humans, but almost all of them have at least one tell. For the protagonist, it's a tendency to waddle when she walks.
** Mr. Cat is the best example of this though. His cat nature usually emerges directly after threatening his female students with marriage.
* In chapter 30 of ''Manga/{{Ratman}}'', Unchain gets a variant. He has the power to absorb the DNA of things he consumes, which have mostly been normal and genetically engineered animals. When fighting Ratman, every single cell in his body screams that he can't possibly win, that Ratman is about a hundred steps higher on the food chain than him. Considering that he considered himself the top of the food chain (which is probably also where his name comes from), it's something of an ironic defeat.
* In ''Manga/RanmaOneHalf'' Maomolin is a giant ghost cat that's looking for a human bride. He can be troublesome due to his ghostly powers (and that the main protagonist is afraid of cats). But he's also easily distracted by things that would attract a real cat.
* In the ''Anime/{{Pokemon}}'' anime, Meowth of Team Rocket sometimes reverts to regular feline behavior. Though he's a GadgeteerGenius who taught himself how to speak human language and walk bipedally, he can't resist a chasing a ball of yarn on all-fours or chowing down on a bowl of clams. This was more common in the early seasons; in the recent ones it almost never happens.


[[folder: Comic Books ]]

* In ''ComicBook/SamAndMax'', one comic story has Sam (a dog) incapacitate a crook by biting his arm. It works, but afterwards, Sam says to the audience that he's never done that before, and he's really embarrassed.
* ''ComicStrip/{{Nero}}'': In "Allemaal Beestjes" Nero is transformed into a lion and sent to Africa, where he apparently ate a tourist. All the others are horrified about this, but he claims: "Well, I was hungry."


[[folder:Fan Works]]
* ''WesternAnimation/MiraculousLadybug'' fanfiction frequently depicts Miraculous wielders picking up traits from their respective animals - mainly, Adrien behaving like a cat when out of costume (everything from purring when scratched or petted to playing with yarn, getting in boxes and chasing laser pointers) and Marinette being more affected by cold weather. The story ''[[http://archiveofourown.org/works/5362856/chapters/12384923 Obsession]]'' and its sequels are a standout example, as is ''[[http://archiveofourown.org/works/5976262/chapters/13733869 One Thing After Another]]''.


* In ''Film/AnAmericanWerewolfInLondon'', before David turns into a werewolf he starts having dreams of hunting, killing and eating a deer in the forest.
* In the ''Film/CatPeople'' remake, the first time Irena comes close to transforming, she strips off and hunts a rabbit in the bayou. Earlier, when frightened, she leaps to the top of a wall. Her brother Paul often climbs trees and after a transformation, will eat the leftover skin clinging to his body.
* In ''Disney/TheBlackCauldron'', Fflewddur Fflam keeps getting turn into a frog and back again by witches. Moments after he's turned back to normal for good, he catches a fly with his tongue and eats it.
* In ''Film/Gremlins2TheNewBatch'', one Gremlin drinks a brain hormone solution and becomes extremely intelligent. However, he is still as sociopathic as his fellows, even shooting another gremlin in the face just to make a point about civilization.
* ''Film/CatWoman'' has the titular character start doing stereotypical cat things like going crazy for catnip, hissing at dogs, and eating several cans of tuna. Yes, it's every bit as painful to watch as you'd imagine.
* Creator/JackNicholson's character in ''Film/{{Wolf}}'' is gradually turning into a wolf showing certain behaviors like peeing in his enemies shoes, walk around a fence like a caged wolf and hunt animals in the night.
* After Tiana is turned into a frog in ''Disney/ThePrincessAndTheFrog'', she starts reflexively lashing her tongue out at passing insects, much to her horror and disgust. The same thing happens to Naveen, but he just runs with it and starts deliberately hunting bugs for his dinner.
-->'''Frog!Tiana''': No, no, no, no! There is no way I am kissing a frog and eating a bug on the same day!

[[folder: Folklore & Mythology ]]

* One of Aesop's fables, "The Cat-Maiden" involves this. The gods Jupiter and Venus have a bet as to how much people can change themselves. They [[HumanityEnsues turn a cat into a human woman]], and set her up to marry. Venus proves her point that "nature will out" by causing a mouse to run through the wedding ceremony, causing the cat-bride to embarrass herself when she tries to chase and eat it.
** In ''Aesopus Emendatus'', Creator/AmbroseBierce does his usual piss-take on it by having the cat-turned woman not try to chase it, but rather to [[EekAMouse scream and carry on so much]] that the human she was falling in love with gets fed up.



* Werewolves in ''Literature/{{Discworld}}'' have some doggy instincts even in human form. They tend to wince at the word B.A.T.H., for instance. Angua is the only one who tries to suppress these instincts.
** Some Vampires have almost as much trouble, particularly with the reversed-names thing.
** Played horrifyingly straight in ''Discworld/WitchesAbroad'' with the Big Bad Wolf. [[spoiler:Lilith]] tried to "enhance" a wolf so that it would think and speak like a person... which left the beast a tortured mess torn between human logic and animal instincts.
* ''Literature/{{Animorphs}}'': Happens at least once a book, what with it trying to be educational and teach kids about different animal instincts.
** Every time they morph seagulls, HilarityEnsues as they find it hard to maintain a coherent train of thought because they keep greedily eyeing every dumpster with a half-finished bag of chips sticking out as they fly over.
** "Kill. Kill. Kill and eat." -- a lobster brain
** Then there was the wolf morphs. Jake was the alpha and couldn't stop himself from peeing every so often to mark territory.
** Marco, having anticipated dog morph to be pretty much the same as wolf form, was caught off guard by the domestic dog's urge to goof off. (''And dogs, they want to have fu~un, Oh dogs, just want to have fu~un...'')
** Once Cassie was almost eaten by Tobias in hawk morph when she morphed into a squirrel for the first time and was temporarily overwhelmed by its instincts as a prey animal.
** One of Tobias' major character struggles is trying to maintain his humanity despite being trapped in a (fairly)-permanent hawk form.
** The termites. At first they were fine, until they got near the hive and were hardly able to assert their will over over the Queen's control. A similar thing happens when they try ant morphs. They wisely never use those morphs again.
** When they go dolphin, they often have trouble focusing because their minds are so playful. It still makes a good combat morph due to dolphins' ideas of fun.
** Marco once accidentally ate Ax when he was a cobra and Ax was a spider. He stopped himself from swallowing, but Ax had to emergency-demorph as Marco's fangs had poisoned him.
* Inverted in the ''Literature/{{Belgariad}}''. A sorcerer who takes the form of an animal will find that they start to acquire that animal's instincts and some of its behaviour. This gets worse the longer you spend in that form, and as Belgarath notes when the time comes to change back to your natural form you might not want to. However, as a side benefit you instantly acquire the language of the species you change into and retain it when you change back, because all animal languages are the result of brain patterns not culture.
* Appears regularly in David Brin's ''Literature/{{Uplift}}'' novels. Almost all Galactics - alien species that were genetically engineered by older species to give them sapience - have their own, unique forms of what they call "stress atavism." Great psychological stress causes these creatures to partially or totally revert to the instinctual behavior of their non-engineered ancestry. It's also seen among humanity's own "client species": the dolphins in ''Startide Rising'' suffer this fate to varying degrees and in varying forms, and it's a lesser plot point among the chimps in ''The Uplift War.''
** It's worth noting that humanity, whom all the Galactics are convinced was abandoned by their patrons halfway through their uplift, since everyone knows that the notion of a species evolving to sapience on their own is utterly ridiculous,[[note]]just like their [[CalculusIsArcaneKnowledge silly mathematics]], wait, what's that you say about the galaxies moving apart?[[/note]] does not exhibit stress atavism.
* In ''Literature/{{Seraphina}}'' dragons are prohibited from eating meat in human form so their carnivore instincts donít lead to unfortunate consequences for the humans around the table...
* In ''Literature/AWolfInTheSoul'', as his werewolf transformation gets worse and worse Greg starts doing insane things like eating raw meat right in front of his family.
* Blacknail the goblin from ''Literature/TheIronTeeth'' web serial is taken in by human bandits. He acts and thinks like a human, until he doesn't.

[[folder: Live Action TV ]]

* All the transgenics from ''Series/DarkAngel'' are subject to this occasionally. Dog-based Joshua growls, snuffles interesting things, and acts like an excited dog around food; cat-based Max and Alec show varying feline behaviors like distrusting dogs, fastidiously bathing, acting predatory around prey animals, picking the people who least want to see them at the moment and sitting right next to them...
* In ''Series/{{Sanctuary}}'', [[OurWerewolvesAreDifferent Henry]] can't help [[EyesNeverLie his pupils dilating]] when asked how he'd feel if he would smell the blood of a wounded animal in the woods, even if he answers he'd feel sad.
* In ''Series/BeingHumanUS'': When Josh and Nora are "being together", Josh abruptly abandons ship after he accidentally growls.
* In ''Series/FaerieTaleTheatre's'' telling of "The Frog Prince", at the end the fully human prince is standing for a family portrait when a fly comes buzzing around. Cue his eyes tracking it and his tongue flicking out.
* Bud in ''Series/{{Grimm}}'' is an Eisbiber (a [[OurWereBeastsAreDifferent beaver-like Wesen]]) and he mentions once that without supervision his children will chew the furniture. Of course, most animal-based Wesen have similar behaviors of that of the animals they represent (the [[BeePeople Melifers]] live in close communities with a Queen, the [[NiceMice Mauzhertz]] are coward, the [[SheepInSheepsClothing Seelengut]] have a flock mentality and all [[PredatorsAreMean predatory wesen]] are agressive to at least some level).
* In the Halloween episode of ''Series/ThatsSoRaven'', Raven and Chelsea inflict a spell that accidentally causes them to slowly turn into cows. At the party they display multiple behaviors of a cow despite being mostly human. This includes Chelsea eating straw and book pages, drinking with her face instead of a cup, Raven chewing cud, and both of them mooing a lot.


* BBC sketch show ''Series/SonOfCliche'' had a scene where a literary editor is taking a client out to lunch to discuss how well the biography is going. The client is a young man who for most of his life was raised by wolves. Whilst the agent orders ''agneau a la maison'', the wolf-boy asks for his lamb to be "very very rare, please. In fact, still alive." This raises a little consternation among other diners. Then the waiter asks if everything is alright, as sir has vanished under the table. Wolf-boy says he'll be done in a moment. Could you bring me some dead leaves, please? Wolf-boy also pays attention to an attractive female diner a table or two away...

[[folder: Tabletop Games ]]

* ''TabletopGame/{{GURPS}}'' calls this Stress Atavism. Most templates for uplifted animals have it.
* In ''TabletopGame/EclipsePhase'' Atavism is a mental disorder that uplifts can take, sufferers are viewed with horror by others of their species. There's also a specific atavism for neo-octopi, autophagy (eating own limbs).
* This is common in ''TabletopGame/ChangelingTheLost'', as shown in the Curses for changelings of the Beast and Elemental Seemings. Beasts spent so long as wild animals that thinking non-instinctively is hard for them, resulting in a penalty of rolls requiring Intelligence. Elementals, likewise, spent so long as a primal force that interacting socially with other humans is a rough affair.
* In a ''Literature/DragonMagazine'' expansion to the ''TabletopGame/DungeonsAndDragons'' setting of ''TabletopGame/{{Mystara}}'', the [[CatFolk Rakasta]] were given a mythological origin that was taken straight out of the Cat-Maiden above under mythology. This being AD&D, the mother-goddess of the Rakasta actually went on to become [[Myth/EgyptianMythology Bastet]] on Earth until Christianity wiped out her worshipers and she returned to Mystara in a snit. She created the Rakasta by turning the Cat-Maiden and her fiance into the first of the race when it was pointed out to her than robbing the man of his wife after her catlike behavior was unfair to both of them.
* In the ''TabletopGame/OldWorldOfDarkness'', the Midnight Circus has [=McTargart=] the Dog-Faced Detective amongst its freakshow. Despite his appearance, with a grotesquely canine snout in lieu of a face, he's pure human. He just has a very grotesque birth-defect. Despite this, he ''still'' has a tendency to act like a dog in times of stress.
* Meanwhile, in the ''TabletopGame/NewWorldOfDarkness'', this is a drawback amongst skinthieves so common that it actually has its own aspect dedicated to it; the Strong Instincts aspect. Strangely, it's not an entirely negative trait.
* Artwork in the rulebook for ''TabletopGame/{{Traveller}}:The New Era'' showed a flying car full of Vargr (canine humanoids), all sticking their faces out into the slipstream like dogs in a present day car.


* Cerise Hood from ''Franchise/EverAfterHigh'' is the daughter of Literature/LittleRedRidingHood and [[spoiler:the Big Bad Wolf]]. She sometimes shows her heritage [[spoiler:by growling when mad and ''really'' liking meat.]]


* Nick Bottom in ''Theatre/AMidsummerNightsDream'' is an especially funny example; he isn't aware that he's got an ass's head, he just knows that he's in the mood for oats, dried peas and a bottle of hay.
* In the first act of ''Prince Ivan'' by Alexander Ostrovsky one of heroes wonders aloud why does he always want to meow when he feels sad. A stray cat hears him, turns into a [[PettingZooPeople human-sized bipedal cat woman]] and tells that she is his mother, who lost him some 20 years ago. (Later she turns out to be a [[BalefulPolymorph cursed]] Oriental sorceress princess.)


[[folder: Video Games]]
* In ''Franchise/TheElderScrolls'' series, members of the [[PettingZooPeople Beast Races]], [[LizardFolk Argonians]] and [[CatFolk Khajiit]], include hisses and growls in their combat vocalizations.
* In the Black Velvetopia level of ''VideoGame/{{Psychonauts}}'', Raz gets the bulldog painter to help by asking "Who wants to go for a walk?" The painter struggles against, but gives in to his "stupid dog brain."
* A brief example from the October 1st Nintendo Direct [[http://www.youtube.com/watch?v=wLOKVABfrzw trailer]] for ''VideoGame/SuperMario3DWorld'' (about 0:49 of the video): Mario, in his Cat Suit, is shown sneaking up on birds and trying to pounce on them.
* Keaton from ''VideoGame/FireEmblemFates'' is a [[OurWerewolvesAreDifferent werewolf]] who frequently tries to hide his more dog-like habits when he's in his human form. The most common example is him trying to deny the fact that his tail wags when he's happy, but Keaton also does things like state that he ''guesses'' he "doesn't mind" when Corrin brushes his fur in a somewhat {{tsundere}} manner (if invited to Corrin's castle quarters).
* Discussed in ''VideoGame/AnimalCrossingPocketCamp'' by K.K. Slider, the doglike [[PettingZooPeople Petting Zoo Person]]:
-->''"Last guy who threw me a stick... I'll admit, I chased it, but it debased us both. Don't do that to us."''

[[folder:Web Animation]]
* In the ''WebAnimation/{{RWBY}}'' episode "Burning the Candle", [[CatGirl Blake]], despite her annoyance, can't resist following Yang's laser pointer. A few episodes later, she's the only member of Team RWBY to [[AnimalJingoism dislike the corgi]] Ruby and Yang's father sent.
** In a much earlier episode, after TheReveal and Blake and Weiss' big falling out, Ruby makes an off-hand comment along the lines of "she does like tuna a lot". [[BrickJoke Much later]] in Volume 3's episode "Round One", when Team RWBY are getting some food, everyone gets a huge bowl of noodles except Blake, who instead gets a huge bowl of fish. And when Weiss' card is declined, she is not happy about having it taken away and immediately dives on Pyrrha's offer to pay for it.
** In ''WebAnimation/RWBYChibi'' she's shown to also be terrified of vacuum cleaners. But then, ''Chibi'' is explicitly not canon.
** Blake's mother Kali, likewise a cat Faunus, at one point drags an unconscious [[spoiler:White Fang assassin]] into the room like a housecat presenting its kill.


* Myan from ''Webcomic/CatNine'' still acts like a cat whatever form she takes. It's doesn't matter much if she transforms into something similar(like tigers) or if she transforms to a human/CatGirl, but she's having trouble with her owl form.
* All over the place in ''Webcomic/{{Freefall}}'', the TropeNamer.
** Florence the wolf is the main target.
*** She puts a bowl of leftovers in the fridge covered in towels, as mentioned in the page quote.
*** Smacks her nose against the screen when a mouse goes by.
*** Is unable to avoid barking at a cat in an early strip, which is funny because real wolves rarely ever bark.
*** Has trouble trusting Sam because she thinks he's acting like a low-ranking pack member.
*** And [[http://freefall.purrsia.com/ff1200/fv01177.htm this]] ([[http://freefall.purrsia.com/ff200/fv00191.htm explanation]]).
*** [[http://freefall.purrsia.com/ff1800/fc01767.htm Frisbee!]]
*** [[http://freefall.purrsia.com/ff2800/fc02746.htm Ball!]]
*** [[http://freefall.purrsia.com/ff1500/fv01448.htm The instinct to chase a ball is very strong, but she does remember common courtesy.]]
*** [[http://freefall.purrsia.com/ff2200/fc02123.htm Weaponized!]] By Sam!
*** [[http://freefall.purrsia.com/ff2000/fc01942.htm Hazel: Can I have a candy skull? Florence (thinks): What's not to love about a celebration where you get to gnaw bones?]]
*** Florence's approach to morning aerobics is [[http://freefall.purrsia.com/ff1200/fv01200.htm chasing her tail]].
** Sam is prone to falling back on his scavenger-instincts too, claiming that "Food tastes better when you steal it from a predator", among other things (though often he does this deliberately).
** Now, watch Sam and Florence's instincts [[ValuesDissonance crash into one another]]; what Florence the social predator sees as cowardly behavior from a lower-ranking pack member is considered to be nigh-heroic alpha male behavior by Sam's species (provided you do it to your enemies; Sam got chased off his homeworld when a stunt like this got out of hand and ended up seriously inconveniencing ''his own'' royal family).
** Even the robots might be subject to this. They will believe transponder identification over visual identification, and in a throwaway gag one robot says he has an urge to get an oil change every 5000 km.
** More recently, a character from the long-scrapped uplifted chimpanzee project was introduced. Despite his enhanced intellect, he's still hyper-aggressive, throws or hits things when upset, and considers eye contact threatening behavior, leaving him completely unable to read most other sapients' social cues and/or interact safely with society.
--->'''[[spoiler:Dr. Bowman:]]''' At some point, I'm going to throw the data pad. I don't have control over this. If my arm goes back, get out of the way.
* From ''Webcomic/GirlGenius'' comes Krosp I, Emperor of All Cats - basically, a cat with human-level intelligence, speech, thumbs, and the ability to walk erect. He'd like to claim that his 'cat-instincts' have no hold over him, but Agatha rather enjoys proving otherwise. [[http://www.girlgeniusonline.com/comic.php?date=20070917 Using a piece of string]]. In the main comic, a young minion earns Krosp's respect [[http://www.girlgeniusonline.com/comic.php?date=20070601 by bringing him dead rats]].
* ''Webcomic/EerieCuties'' is on a gleeful rampage with this.
** Kade's [[http://www.eeriecuties.com/strips-ec/cats_are_great_listeners reaction]] on Ace is an example.
** Brooke [[http://www.eeriecuties.com/strips-ec/heebie-jeebie_eyes! used it]].
** Nina as a chocolate-loving vampire has her instincts rather... [[http://www.eeriecuties.com/strips-ec/sho-o-o_shorry! haywire]].
** Also, [[http://www.eeriecuties.com/strips-ec/one_true_nature the unfortunate story]] of Brooke and her pet mouse, Skittles.
* In ''Webcomic/{{Homestuck}}'', after [[spoiler:Jack noir is affected by Becquerel's prototyping]] he is annoyed [[http://www.mspaintadventures.com/?s=6&p=005454 by his new dog instincts]]
** And now [[spoiler:Jade]] can't keep from barking at a cat.
* Even after gaining a genius-level intellect, [[Webcomic/PvP Scratch Fury, Destroyer of Worlds]] still succumbs to his feline instincts on occasion.
* ''Webcomic/HeadTrip'' [[http://headtrip.keenspot.com/d/20120416.html once]] {{discussed}} the missing (and rather inconvenient) side of ''ComicBook/{{Catwoman}}''.
* Played for cuteness in ''Webcomic/ButImACatPerson''. The Cat [[http://erinptah.com/catperson/comic/chapter-six-page-11/ will curl up in your lap]] for petting; the Raven [[http://erinptah.com/catperson/comic/chapter-five-page-20/ has a hard time managing legs]].
* ''Webcomic/TheWhiteboard'': In [[http://www.the-whiteboard.com/autotwb1587.html this]] and following strip, feline Pirta pounces a rodent customer, her instincts getting the better of her.
* Kat, the [[PettingZooPerson cat/girl]] of ''Webcomic/SequentialArt'' has moments of this, such as going to the grocery store and insisting on buying 18 quarts of cream. (Scarlet's instincts show up too, but she's a squirrel, so most of ''her'' instances fall more under AttentionDeficitOohShiny)
* From the webcomic ''Tanktop, Texas'': "[[http://www.antelucan.com/archive/tanktop-texas/28 I am a dog]], should I pretend to be something I'm not?". Subverted in that the animals in this strip are quite the {{Intellectual Animal}}s and he turned into his feral self deliberately, just to prove a point.
* Seen in ''Webcomic/TailsTheDouche'', when Tails, after freeing the cute chickens from the Mystic Cave boss capsule, starts eating one alive.
* Marena of ''Webcomic/KeychainOfCreation'' is a [[TabletoGame/{{Exalted}} Lunar Exalt]], and has vulpine ([[AllAnimalsAreDogs and occasionally canine]]) instincts, which Misho [[http://keychain.patternspider.net/archive/koc0199.html sometimes takes advantage of]].
** In one filler strip she's meditating to control her instincts, then [[http://keychain.patternspider.net/archive/koc0287.html a bird lands by her]].
* ''Webcomic/{{Whither}}'' has a [[CleverCrows crow]] as a speaking character. He digs in the trash for snacks.
* In ''Webcomic/{{Housepets}}'' Keene is a ferret who happens to be wealthier than some countries, but take him to a golf course [[http://www.housepetscomic.com/2011/02/23/relaxing-pastime/ and...]]

[[folder: Web Original ]]

* In the rebooted Furtopia RP of ''Roleplay/DarwinsSoldiers'', Captain Kayle Storm (an unspecified lupine soldier) [[LampshadeHanging Lampshades]], subverts and plays this trope straight. When his rifle jams, he clubs a terrorist with it and latches his jaws onto the terrorist's face and proceeds to maul him. Subverted in the fact that he spends a few seconds vomiting after he does so.
--> '''Capt. Storm:''' Instinct. What a love-hate relationship.


[[folder: Western Animation ]]

* Brian from ''WesternAnimation/FamilyGuy'' lives this; his family members even occasionally ''invoke'' the trope to distract and/or humiliate him. For example, he will chase balls, is attracted to the sound of dog food in a bag, and is terrified of the vacuum. He also has a tendency to bark at strangers, especially black strangers (subconscious racism due to his father, something he is very ashamed of). He will sometimes fail to recognize himself in a mirror, thinking it is another dog (though this only ocurred in a gag, followed by Peter doing a similar thing).
** Probably best represented in an early episode where Brian goes off to see the world. We see him digging for fossils (with a trowel), uncovering a bone and being proud of his discovery. Then he immediately re-buries it (with his hands[=/=]paws) and sits on the spot, looking around to make sure nobody tries to take it.
** Every now and again Stewie gets a "baby reminder" (being unable to see Peter when he covers his face with his hands, for example), just to point out that he's still technically an infant.
--> '''Stewie:''' Where the devil did he go?
--> '''Peter''' ''(uncovering his face):'' Peekaboo!
--> '''Stewie:''' AAAAH!
* On ''WesternAnimation/FostersHomeForImaginaryFriends'' Mr. Herriman, a rabbit, has an addiction to carrots that he's ashamed of. Not to mention his fear of dogs, which is so strong that he calls his assistant "[[YouCalledMeXItMustBeSerious Frankie]]" instead of his usuall "Ms. Francis."
* A common gag in ''WesternAnimation/TUFFPuppy''. Most often in the form of Dudley chewing his own butt. Kitty acts on her instincts much less often than Dudley, but give her a cat toy and...
** The Chameleon often blows his cover because whenever he sees a bug he has to eat it.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** Spike, who while normally TheHeart and TheReliableOne of the team, is still a young ''dragon'' and will on instinct gather up goods for a "hoard". Going too far in this will ''literally'' turn him into a monster.
** Thorax, a changeling who would rather [[FriendlyNeighborhoodVampire hang out than drain the love of others]] ''still'' can't help but hiss and flick his tongue when faced with an abundance of love or affection. The way he quickly apologizes and even trembles and sweats as he does it makes it [[DoesThisRemindYouOfAnything very reminiscent of a recovering alcoholic or drug addict]].
* ''WesternAnimation/MyLittlePonyEquestriaGirls'' has Twilight Sparkle trying to run about on all fours when she's first [[HumanityEnsues turned into a human]]. In a later scene, still getting used to being a human, she tries to eat an apple with just her teeth, to the bafflement of Fluttershy's AlternateSelf. Eventually, [[BigBad Sunset Shimmer]] attempts to ruin Twilight's popularity with [[InstantHumiliationJustAddYouTube video footage of her clumsy attempts to adjust to the human world]].
** After joining the Humane Cast, Sunset, also being a Pony in human form sometimes slips into this, holding her hands as fists to imitate hooves. Given how long she's been in the human world, it's much more subtle and she's learned not to do it for the most part. In fact she's been in the human world so long that when she returns to Equestria in Mirror Magic she forgets to walk on all fours, at first struggling but managing to stand on her hind legs before getting odd looks and remembering and tries and fails to pick things up with her hooves before being reminded she has horn and thus levitation magic by Starlight... (A bit of Fridge logic occurs when you remember she had no issues moving as a pony or using her magic in the first movie, but she was in Equestria for much longer then, giving herself a chance to remember before encountering the cast)
** Speaking of Starlight, she goes with Sunset to the Human World for the rest of of the short, falling into many of the same issues as Twilight did in the first movie (including trying to run on all fours at first). Thankfully she has Sunset to coach her through these moments, though some of them end up embarrassing Sunset.
* WesternAnimation/RegularShow : Rigby the raccoon has an addiction to eating out of the trash, which Mordecai calls him out on. Whilst Rigby can stand up and walk, he usually runs on all fours. Rigby also becomes roadkill in an early episode, but survives, [[ItMakesSenseInContext due to his soul being outside his body (which was then possessed) at the time]].
* ''WesternAnimation/TheSimpsons'': In "[[Recap/TheSimpsonsS8E9ElViajeMisteriosoDeNuestroJomer El Viaje Misterioso de Nuestro Jomer]]" Homer meets his SpiritAdvisor who is a coyote. He offers Homer advice to search for his soulmate. While Homer overthinks this the animal starts biting Homer's leg. Homer pushes him away, whereupon the coyote apologizes and defends himself: "I AM a coyote".
* In ''WesternAnimation/GravityFalls'', a cat-creature serving as judge [[spoiler:in Mabel's fantasy land in ''Weirdmageddon Part 2'']] starts out being distracted by a hanging ribbon, and subsequently permits something in the courtroom on the grounds that "cats are famously curious".
* In the 1963 WesternAnimation/BugsBunny short ''Mad as a Mars Hare'', Bugs gets lured out of a spaceship he rode to Mars by having him fetch a carrot. And then pulling the egress ladder away so he'd have to explore.
-->'''Bugs:''' Darn it. Betrayed by my baser reflexes again.
* In ''WesternAnimation/TheNewMrPeabodyAndShermanShow'', Sherman tries to bring in a cat to deal with a rodent problem. While he desperately tries to fight them, Mr. Peabody's canine instincts trigger so hard that he ultimately transforms into a feral dog and gives chase.
* In ''WesternAnimation/TheScoobyDooAndScrappyDooShow'', Shaggy and Scooby switch bodies in one episode. In Shaggy's body, Scooby still a bad driver, and despite very much wanting to switch back is easily distracted by a cat.
* In ''WesternAnimation/InfinityTrain'', the corgis of the corgi car are intelligent and can speak English, but still act like dogs. Atticus doesn't like being picked up, likes belly rubs, and so forth.
* The cast of ''WesternAnimation/{{Kaeloo}}'', who are animals but behave like humans, sometimes have things like this happen to them. For example, in one episode, Mr. Cat pounces on a ball and plays with it like a real cat.
* ''WesternAnimation/PennZeroPartTimeHero''' features this. Due to a mix up in the particle transporter, Penn's genes are spliced with the equivalent of an alien dog's. As a result, he begins acting like the creature. He chases bugs, begs for treats and arguably barks by saying the words "Flurgle Burgle" Needless to say this was not an easy mission for the trio.