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[[quoteright:350:[[Film/FreakyFriday http://static.tvtropes.org/pmwiki/pub/images/Freaky_Friday_Flip_1520.png]]]]
[-[[caption-width-right:350:[[BeCarefulWhatYouWishFor "I wish I could switch places with her, for just one day..."]]]]-]

->'''''Body Switch Movie:'''''\\
''The brain of one character somehow finds itself in the body of another. Requires actors to confront an actor's nightmare, i.e., acting as if they were another actor.''
-->-- ''Literature/EbertsGlossaryOfMovieTerms''

The most benign subtrope of BodySnatcher: two or more characters swap bodies (or, equally, swap minds) by some form of magic or AppliedPhlebotinum. Typically, a deeper appreciation of the other's life is attained. Named for [[Film/FreakyFriday a novel and movie]] about a body swap between a mother and her daughter.

To be really convincing, the actors may have to mimic the body language and speech patterns of the actor they are supposed to have switched with - ie, an older person using very modern language and slouching. This is doubly complicated if they are trying to imperfectly pretend they are the other person.

When this plot is done in animation, usually the ''voices'' [[VoicesAreMental also switch]] as narrative cheat to help younger viewers keep track of who's who. More subtly, it's just the eyes. More serious/action-oriented shows might not do this. The Flip often involves characters of different ages, genders, races, or social classes. Another variation is a protagonist and antagonist switching, which usually involves each trying to undermine the other's organization while simultaneously trying to switch back. Alternatively it may lead to a HeelFaceTurn. If one or both of the characters have [[StockSuperpowers superpowers or other special abilities]], they'll [[HowDoIShotWeb have a lot of trouble figuring their new powers out]].

A similar idea, with less learning and more evil, is GrandTheftMe. Compare PersonalitySwap, when the characters' personalities are swapped but their minds stay where they are meant to be. It will often involve similar tropes to transformation stories (such as GenderBender) as this is essentially two of these in one, with the addition of confusion resulting from the transformations being into other known characters.[[note]]TheMirrorShowsYourTrueSelf is sometimes used to reveal the switch.[[/note]]

Nearly an ObligatoryJoke in some genres (as in, bound to happen sooner or later in the series, if it's popular enough).

In the more traditional applications of the trope, [[SlipstreamGenre the reason of the switch is never explained in-universe]]. However, the [[WatsonianVersusDoylist Doylist]] reason for any application is often to force the age-old [[AnAesop moral]]: To better understand others, you must experience life in their shoes.
!!Example subpages

* FreakyFridayFlip/AnimeAndManga
* FreakyFridayFlip/ComicBooks
* FreakyFridayFlip/FanWorks
* [[FreakyFridayFlip/LiveActionFilms Films Live-Action]]
* FreakyFridayFlip/{{Literature}}
* FreakyFridayFlip/LiveActionTV
* FreakyFridayFlip/VideoGames
* FreakyFridayFlip/{{Webcomics}}
* FreakyFridayFlip/WesternAnimation


* A T-Mobile advert from 2003 shows a woman getting a video message from her husband. The video shows her young daughter activating her science project; a brain switcher, which swaps her older brother's body with the family dog. The dog speaks with the son's voice while the boy lifts his leg to scratch behind his ear. Cue mom {{Fainting}}. A very brief scene after this shows the dad playing fetch with the dog in the boy's body.

[[folder:Films -- Animation]]
* Happens to Donkey and Puss-n-Boots in ''WesternAnimation/{{Shrek}} the Third''.

* In Music/JohnnyCash's song [[http://www.youtube.com/watch?v=fS7fSL_E4JU "Chicken in Black"]], Johnny's "body's outlived [his] brain", so he is given the brain of a recently killed bank robber. And Johnny's brain winds up in a chicken. HilarityEnsues.

* The MadScientist's experiment in ''Pinball/StrangeScience'' involves doing this with a teenage girl and a chimpanzee.

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons''
** The [[http://www.dandwiki.com/wiki/SRD:Mind_Switch Mind Switch]] and [[http://www.dandwiki.com/wiki/SRD:True_Mind_Switch True Mind Switch]] spells. While Mind Switch is only semi-permanent, True Mind Switch is completely permanent and can only be undone by another True Mind Switch.
** Before this, 2nd edition had the "Switch Personality" telepathic science from ''The Complete Psionic Handbook''. It allows the psionicist to switch mind with another creature, but any prolonged use is dangerous, as both bodies tend to degrade when inhabited by the wrong mind.
** ''The Complete Book of Necromancers'' also introduced the "Life Force Exchange" spell, which is permanent and can be used on any two creatures (including or not the caster). It is one of two powerful spells allowing aged necromancers to [[GrandTheftMe abandon their old body for a new, younger and stronger one]].
** This is just one condition that the [[ArtifactOfDoom Alchemist's Apparatus]], an evil device found the ''TabletopGame/{{Ravenloft}}'' setting can create. (It can also split one being into two bodies, [[EvilTwin one good and one evil]], or merge two beings into ''one'' body.) The only way to reverse ''any'' of this device's effects is to use it a second time, and using it ''at all'' is incredibly dangerous. (Not only is it prone to blowing up, it tends to drive the victims insane, requiring Ravenloft Powers checks for the user and Madness Checks for the victims. Unfortunately, even when it does blow up, someone always rebuilds it later.)

[[folder:Web Original]]
* The WebVideo/{{Britanick}} video "A Monologue for Three" ends with a four-way body swap between Brian, Nick, Danny Pudi, and . . . well, you'll just have to watch it.
* There is a web series made by [[ThreeAmigos Three friends from Florida]] called ''WebVideo/FreakyForever''. It can be watched [[http://www.youtube.com/user/osnapitzari here.]]
* In the LoadingReadyRun video [[http://www.youtube.com/watch?v=UGSNu1kNU_U "Brain Transplants Made Easy"]], Paul does this to everyone just to prove a point. This is taken to the hilarious extremes of [[spoiler:Jer]] getting switched with [[spoiler:Dana (a random stranger)]] and [[spoiler:Bill]] getting switched with [[spoiler:Gib (a puppet).]]
* ''Series/{{Noob}}'' has a dungeon that will cause an avatar switch between two players after the first boss gets beaten. Voices don't change despite the fact that it would actually make sense.
* This happens to all the main characters in the TheDevilIsAPartTimer Halloween OVA.
* Used in, of all things, the ''WebVideo/SuperMarioLogan'' episode "Switching Bodies!". Chef Pee Pee and Bowser Junior both go to bed wishing what it's like to be each other, and then wake up the next morning with their bodies switched. HilarityEnsues, surprisingly. This is soon exploited when Chef Pee Pee-as-Junior tells Junior's friends to take his toys, and Junior-as-Chef Pee Pee angrily gets back at him by telling Bowser to start beating, strangling, insulting and paying him, knowing that Chef Pee Pee will get blamed for saying that.
* When Body Switching Movies Collide is a skit done by the Website/{{Cracked}} staff. It starts off when [[Series/QuantumLeap Sam Beckett]] Leaped into [[Film/FreakyFriday Ellen Cunningham]]'s mind after she switched bodies with Anna. [[Film/{{Ghost}} Sam Cunningham]], Ellen's dead husband, shows up, explaining how he will possess Sam and have sex with Ellen one last time. Al argues that Sam Cunningham possessing Sam Beckett to have sex with Ellen would result in Anna's body having sex with Helen, who has Anna's mind at the moment. The Ghost Sam leaves in disgust, saying he plans to have sex with someone else. Al reveals that Anna is a [[Film/SpyKids secret agent]] hired for the [[Series/StargateSG1 Stargate project]] in the [[{{Series/Torchwood}} Torchwood Institute]] in Roswell. [[Franchise/TheMatrix Trinity]], who works for the [[Series/{{Millennium}} Millenium Group]], shows up in a [[Series/{{Sliders}} Slider Hole]] and explains that the world is a false reality created by sophisticated computers contained within the mind of [[Film/BeingJohnMalkovich John Horatio Malkovich]]. When Sam Beckett asks Al to Leap him out of this madness, Al can't because he's actually a [[Series/BattlestarGalactica1978 Cylon]]. It turns out it was all Michael Swaim's dream, and the camera zooms out to reveal that sequence was [[Series/StElsewhere imagined by Michael looking at his snowglobe]].
** [[http://www.cracked.com/blog/so-youve-swapped-bodies-with-your-mortal-enemy/ "So You've Swapped Bodies With Your Mortal Enemy"]] [[ExactlyWhatItSaysOnTheTin which is about a guy finding out he switched bodies with his mortal enemy]].
* ''Machinima/Supermarioglitchy4sSuperMario64Bloopers'' pulls this off accordingly, not once, not twice, but ''three times''.
** "The Switcheroooveralls". Mario, [=SMG4=] and most of the gang switch their color codes in this blooper. Hilarious antics ensue, including a crazy Indian mistaking [=FM54321=] for [=MCGustavo=], and attempting to chase him as revenge for [[ItMakesSenseInContext stealing his toilet]], Luigi, in X's body, becoming friends with a Toad zombie he calls "Brains", and Toad even becoming a rock, forced to spend his time with Bowser after accidentally getting thrown towards his lair.
** The episode "The Swap", where Mario annoys a wizard to the point where he switches his and [=SMG4=]'s bodies as punishment. It doesn't help that [=SMG4=] is applying for a job as a janitor.
** "Mineswap" has this. Mario starts to break a scientist guy's machine as Steve mistakes it for chocolate, leading to the two swapping body shapes; Mario becomes a ''VideoGame/{{Minecraft}}'' model while Steve is a ''VideoGame/SuperMario64'' color code. [[spoiler:This is defied since in the end, [[{{Cliffhanger}} the machine is destroyed and Mario and Steve are still in their opposite body shapes]].]]
* In one episode of ''WebVideo/TheTimeGuys'', Doc Chronos invents a brain-switching device. [[spoiler: [[DefiedTrope Turns out he can only invent time machines]].]]
* In ''WebAnimation/{{Ducktalez}} 3'', Vegeta pulls a Captain Ginyu on Scrooge [=McDuck=]. [[ArtShift Vegeta gets Scrooge's art style and Scrooge gets Vegeta's art style]]. Dewey and Louie immediately wonder why Scrooge looks crappy.

[[folder:Real Life]]
* Scientists have found that by syncing a pair of VR goggles on one person's head with a set of cameras on a mannequin or another person's head, the brain is fooled into believing that they are in the body of the mannequin or the other person. Again, [[http://www.newscientist.com/article/dn16180-swapping-your-body-becomes-a-virtual-reality.html no, seriously.]]