[[quoteright:320:http://tvtropes.org/pmwiki/pub/images/gainaxing.jpg]]
[[caption-width-right:320:[-In ''{{Gravion}}'', leaning back is... jiggly. ([[http://img9.imageshack.us/img9/34/helicopter2.gif animated]])-] ]]
->''More Bounce''
->''More Bounce!''
->''Much more Booouuunce!''
->-- Roger Toutman, "More Bounce To the Ounce"

The act of drawing a female character with [[GagBoobs unusually large and buoyant breasts]] and [[{{Vaporwear}} without a bra]], then animating every individual jiggle, sway, bounce and bobble they undergo. Also known as GainaxBounce or the Gainax Bounce Effect.

The motion so displayed is typically asynchronous -- each breast is animated separately and possesses its own individual movement.

Also used to describe the movement itself.
The term was coined by fans some time before 1993 and makes reference to the anime production StudioGainax, many of whose earlier releases made use of this particular variety of {{Fanservice}}. According to a Usenet post from 1993, one particular busty young thing from the Gainax anime ''OtakuNoVideo'' inspired a tongue-in-cheek unit of measurement for {{Gainaxing}}: one full bounce is apparently equal to one "MistyMay".

For the live action TV version, see JiggleShow.

In video games, it would involve JigglePhysics.

When a male does it, it's a PecFlex.

See [[http://www.youtube.com/watch?v=mG_wt7tLke0 this video]] for a short demonstration of the pervasiveness of the trope.

----
!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]

*Parodied in JungleWaItsumoHaleNochiGuu/Hare+Guu in which Gupta thinks back to an anime he saw. [[http://danbooru.donmai.us/post/show/531741/bounce-breasts-brown_hair-city-gif-hairband-jungle see for yourself]].
* Pictured above: Plentiful in ''{{Gravion}}'', espeecially with [[MsFanservice Mizuki Tachibana]], who bounces considerably with the slightest movement, even ''swallowing''.
* ''CowboyBebop'' has the character Faye Valentine, who is breathtakingly beautiful with gigantic pneumatic bosoms that seem to have minds of their own. She also almost invariably dresses in a manner that would, in any American city in the late 20th Century, cause everyone who saw her to conclude immediately that she is a streetwalker. Perhaps she bought all her clothing at the ''DirtyPair'''s garage sale.
** Canon indicates that she does this on purpose [[DistractedByTheSexy to distract men]]. On one occasion she wears a perfectly normal evening gown.
***[[AbsoluteCleavage Perfectly normal]]?!
* The seventh ''OnePiece'' movie had the girls bounce from doing absolutely ''anything''.
** Hell, in a few scenes, Nami will simply be standing around, perfectly still, and her boobs will just randomly bounce quite forcefully all on their own.
* ''{{Gunbuster}}'' (called [[FanNickname "Bustgunner"]] by some fans) and ''OtakuNoVideo'' from Gainax are the two productions which allegedly inspired the term.
** Perhaps ironically, ''Gunbuster'' actually features what can be considered ''as close to realistic as possible'' physics for the bouncing breasts. Noriko's bounced so much mainly because she moved around a lot even when she wasn't wearing a bra.
* Just about any female character in the various ''BurnUp'' animes.
* Mune-mune in Gainax's ''AbenobashiMahouShoutengai'' is a deliberate parody -- right down to her name, which actually translates as "Tits-Tits".
** [[{{Squick}} And]] [[FanDisservice she's]] [[OlderThanTheyLook the main character's]] ''[[DeadAllAlong late]] [[GrandmaWhatMassiveHotnessYouHave grandmother]]''.
* Kurono Kurumu in ''[=~Rosario+Vampire~=]''. The movement of her breasts even produces audible sounds! And in episode 4, Kurumu's fat stalker (or rather, his belly).
* ''ToLoveRu'' seems overly fond of this. Espically Lala. Just watch the OVA opening, 1 minute and 30 seconds of pure bounce.
* Every female character that appears in the various ''[[RanmaOneHalf Ranma 1/2]]'' motion pictures -- even the ones who are supposed to be small-breasted. This contrasts with the main series where they never seem to move at all, since the show is kind of old and didn't have a huge budget.
** Especially since the characters are considerably ''less'' endowed in the television series.
* The sheer quantity of gainaxing found in the anime ''PlasticLittle'' inspired [[ADVFilms ADV]], the North American distributor/dub house, to include an on-screen "Jiggle Count" meter as one of the special features in their DVD release.
* The anime ''ShinkonGattaiGodannar'' takes Gainaxing to the extreme, since even the mecha have breasts (and in one particular case, ''both'' the mecha and the pilot have humongous ''jiggling'' breasts). The only exception to this is Lou, the show's TokenLoli.
* Taeko and a few others in ''AiYoriAoshi''.
* Practically every female role in ''DivergenceEve'' and its follow-up. It may be noted that outside of this and the {{Fanservice}}y opener and closer, the series is remarkably serious in tone and tells its story in blissful, perhaps defiant ignorance of the laws of physiology, if not physics, being broken in the character designs.
* Caldina in ''MagicKnightRayearth''.
* Virtually any adult female in ''DevilHunterYohko''
* The opening credits of ''{{Landlock}}''.
* While not exactly as flagrant, Murrue Ramius of ''{{Gundam SEED}}'' has the dubious honor of having her bouncing chest be one of the few whose bouncing was actually animated and used as StockFootage every time the ''Archangel'' took a particularly nasty hit in battle. This seemed to be limited to her, until first officer Natarle Badguirel ended up in command of her own ship, whereupon she gained the suddenly bouncing breasts (albeit not as dramatically given her modest proportions), as did Flay Alster as part of her crew. Whether this is actually an accurate depiction of how breasts move in zero gravity is debatable.
** Murrue is also the only woman so far in the ''{{Gundam}}'' franchise to have her jiggle ''in the opening credits of the actual series itself.'' The [[JamesBond James Bond opening credits level]] nudity is also bra-less and even had male viewers often going "...those don't work that way." Female tropers, on the other hand, winced in pain and often skipped those credits.
* Yoko, and Kittan's three sisters (who come in small, medium and large for your viewing pleasure) in ''TengenToppaGurrenLagann''. Guess who it's made by. In fact, [[http://www.youtube.com/watch?v=HAAOQHhoyzA the English trailer]] for Gurren Lagann contained the words "that famous Gainax bounce".
** Yoko is an especially amusing example because her breasts seem to ''spontaneously'' Gainax without any movement on her part, whenever any attention is called to them.
*** This Troper swears that you can tell how she's feeling by their position and size: down for sad, perky for happy, fuller for determined...
* Mikuru Asahina, the {{Moe}} character in ''[[SuzumiyaHaruhi The Melancholy Of Haruhi Suzumiya]]'', displays Gainaxing, particularly in the opening credits.
-->'''Kyon''': ''[[CrowningMomentOfFunny Too many beach balls]]!''
* Rushuna Tendo, every episode of ''{{Grenadier}}''. However, as she [[VictoriasSecretCompartment keeps her ammo in her cleavage]], this is actually somewhat practical. The BigBad Setsuna, being similarly well-endowed and trained, does the same thing.
* The [[FanVid AMV]] "[[http://www.animemusicvideos.org/members/members_videoinfo.php?v=7660 The Fanservice Video: Bouncing Back For More]]" by Zarxrax is dedicated to this effect.
* Almost every female character in the anime ''GirlsBravo''.
* Naga the White Serpent, from ''TheSlayers''.
**It almost got her killed once, her rack sprang back into shape after being pressed against a wall, nearly launching her over a cliff.
* Angela, an American visitor to ''{{Genshiken}},'' displays this conspicuously (complete with bouncing sound effects) to make the differences between Japan and America (or at least {{Eagleland}}) more obvious, and to highlight her more upfront attitudes about sex (she is an unashamed YaoiFangirl) and maybe a bisexual (she was at least interested in the male oriented hentai as well).
** Oono also gets this quite often.
* A certain animation team in the rotation for ''DigimonSavers'' used this technique on Rosemon, and it's probably not a coincidence that they animated [=BioLotusmon=]'s only appearance.
* Siesta from ''ZeroNoTsukaima'', pictured [[http://tvtropes.org/pmwiki/pub/images/cit_zero_no_tsukaima_2_behold_the_power_of_siesta.gif here.]] You're probably not looking at the LoveBubbles surrounding her.
** Siesta is ''nothing'' compared to Tiffania, who barely has to ''move'' to set her breasts bouncing around like {{Flubber}}.
** [[IfYouKnowWhatIMean Oh, I'm looking at her love bubbles, all right.]]
* Mai from ''{{Mai-HiME}}'' dresses conservatively, but her somewhat large (but not GagBoobs-level) chest still has a bit of bounce to it. A scene early in the anime replicated during an argument with Yuuichi and Shiho gives them an audible "boing". According to [[AllThereInTheManual supplemental materials]], it's not even Mai who has the largest bustline... she's beaten out ever-so-slightly by ''Haruka'', who ''doesn't'' have a whole lot of bounce, but still looks good in a [[BeachEpisode swimsuit]].
* ''MacrossFrontier'' features a whole raft of characters with sufficiently Gainaxed breasts, including Sheryl and the Miss Macross Frontier contestants (which makes [[{{Pettanko}} Ranka]] uncomfortable.) Also, ''zero gravity bouncing''. Very unique.
** Interestingly the show also subverts the trope slightly: when a fully sized, thirty-foot-tall Zentraedi, Klan Klein has a rather terrifying bust that may actually be capable of ''killing'' a normal-sized human. Micronized, however, she doesn't possess anything that can ''be'' Gainaxed.
* ''[[ReadOrDie R.O.D. TV]]'' had one particularly infamous chase sequence where Nenene finally finds her long lost friend ([[LesYay love?]]) Yomiko Readman. Yomiko runs away and Nenene gives chase. As they sprint, their bosoms (which had been largely still until then) bounce and sway like jello earthquakes. It's also worth noting that Yomiko's bustline went from a mild C-Cup in the OVA well into DD territory for the TV series, set several years later. A late blooming?
** It isn't just the chase scene. Watch Nenene's bosom in the first episode. They ripple like water.
* This happens to Milly and Shirley during one of the SchoolFestival activity episodes in ''CodeGeass'' and to Kallen when she encounters Suzaku on Kamine Island.
* After the TimeSkip in ''MagicalGirlLyricalNanoha'', Nanoha and Fate, no longer [[{{Lolicon}} lolis]], displayed this trope during their TransformationSequence, as did Subaru.
* Surprisingly, several girls in the ''{{Saiyuki}}'' anime jiggle around in action, even though the show is mostly fangirl fodder.
** Then again, ''Saiyuki'' was originally marketed as {{Shonen}}.
* Done poorly with Bekira in ''WagayaNoOinarisama''. Kind of {{lampshaded}} by Noboru taking a quick glance at Kou's assets for comparison. Subverted later on when it turns out those weren't actually her breasts.
* Parodied and [[LampshadeHanging lampshaded]] in an anime-original RPGEpisode of ''HayateTheCombatButler'' where the bouncing boobs of the RPG game's boss is focused on constantly and has a sound so audible a character points out that she hears the sound of the bouncing from a considerable distance away.
* In ''{{Akane-iro ni Somaru Saka}}'''s eighth episode, whenever the camera focuses on Tsukasa, her breasts appear to take on a life of their own. The first scene, which is just a profile shot of her laughing, has them bouncing up and down like crazy.
* In one episode of ''{{Naruto}},'' the seriousness of Gaara transforming [[{{Narm}} is lost]] thanks to Temari's inexplicable Gainaxing, which is something that no character in the show had really shown before or since.
* ''{{Eiken}}'' has a ridiculous amount of Gainaxing happening in almost every scene. Chief among the guilty are Kirika and TokenLoli Komoe, who quite literally bounces part of the opening credits on her chest.
* Margery Daw in ''ShakuganNoShana'''s FestivalEpisode.
* Junko Asagiri from ''DesertPunk'', during the end credits.
** [[GagBoobs And, you know, everywhere else.]]
* Rosette does this in the third episode of ''ChronoCrusade'' -- unfortunately bad animation makes it look as if she had bags filled with water instead of breasts.
* Done with refreshing realism in ''GargoyleOfTheYoshinagas''. A character's breasts do bounce... after one other character steals her bra.
* Yurika in ''{{Akikan}}!'' actually uses Gainaxing as a strategy. In a baseball game with Yell (who's [[AttentionDeficitOohShiny distracted by moving objects]]), she apparently plays without a bra on purpose, leading to very springy bouncing that Yell just can't take her eyes off of.
* Izumi in ''KemekoDeluxe!'', all the time.
* [[FanDisservice Hideously]] subverted in ''TwentiethCenturyBoys'' with [[{{Gonk}} Maruo]]. You know what I'm talking about.
** [[PleaseElaborate Uhh, no I don't...]]
* Studio Gainax is responsible for animating the most recent ''Re: CutieHoney'' {{OVA}}s. Hoo boy, is there ''ever'' {{Gainaxing}} in that show.
* ''NininGaShinobuden'' gives Shinobu a few good bounces in episode 4. Then again, the first half of the episode is a spoof of FanService anyway....
** The baseball episode has a ninja distracting himself by imagining Kaede in a tiny bikini, complete with bouncing. The ''real'' Kaede bowls him over because he's not paying attention.
* Lampshaded in ''SamuraiChamploo'' when small-chested Fuu decides to carry a couple of cherry bombs by sticking them down the front of her kimono. And then she goes for a run. The result is quite comical, which is compounded by the occasional viewer who didn't notice the cherry bomb thing and thinks that her breasts have just gone insane.
* The appropriately-named Bouncy Tiff, who is created to the real Tiff's dismay. She is drawn like a stereotypical magical girl and... err, deserves the "bouncy" portion of her name. Even the youngest character in the crew knows to cover his eyes. The anime she appears in? ''{{Kirby}}: Right Back At Ya.'' [[GettingCrapPastTheRadar Uhh...]]
* Miyuki in ''{{Basquash}}'', who has her bouncing breasts take up the entire screen for a good few seconds.
** Which is taken to the next level with Haruka Gracia, who we get to see jiggle on three separate occasions before actually seeing her face.
* Check the BeachEpisode of ''OnegaiTeacher''.
* In the ''Makai Senki {{Disgaea}}'' anime, we have Jennifer, the female assistant of Captain Gordon, '''Defender of Earth!'''. The sight of her chest bouncing is enough to make Laharl sick.
* Team coach Momoe from ''OokikuFurikabutte''.
* ''Green Green'', to a truly ''ridiculous'' extent.
* In the same vein as Mikuru and ''SuzumiyaHaruhi'' above, Kyou Fujibayashi of ''{{Clannad}}'' Gainaxes like mad in the opening credits of the first season, ''while bouncing a basketball''.
** Kotomi also does so in the BaseballEpisode.
* Also on the same vein, [[OtakuSurrogate Patricia Martin]] displays it during while cheerleading in the opening DancingTheme.
* The ''{{Shuffle}}'' OVA had Sia and Asa Gainax within the first three minutes. Then when Sia's dad replaces the water in the pool with [[NaughtyTentacles eels]], Nerine does as well.
* The anime of ''UminekoNoNakuKoroNi'' gave most of the women and girls a bad tendency to do this, which turns even the discoveries of certain corpses into very distracting, hopefully unintentional {{Fanservice}}.
* In ''{{Bleach}}'', Rangiku's breasts bounce when she is frightened by Capt. Hitsugaya's intrusion. She even says that they almost popped out of her robe.
** When Orihime was about to change (in front of Uryu, [[InnocentFanserviceGirl uncaringly]]), her breasts just flopped down from her shirt. In the video games, she demonstrates this as well.
**[[ElegantGothicLolita Cirucci]] [[EvilIsSexy Thunderwitch]] has a blink-and-you-missed-it one in an {{omake}}.
* Even one of the more serene shows, ''UmiMonogatari'', gets a chance to indulge in this trope. Oshima, Kanon's rival, is flaunting her own bust size, when [[TheMessiah Marin]] comes running up to greet her. Marin, already halfway to being an InnocentFanserviceGirl, is not wearing a bra. The results leave Oshima stunned.
* [[GagBoobs Nodoka]] of ''{{Saki}}'' says hi. Just the simple act of walking could get her breasts jiggling.
* This happens in episode 19 of ''[[Anime/FullmetalAlchemist Fullmetal Alchemist: Brotherhood]]''; for unexplainable reasons beyond pointing out that Havoc likes big boobs, Lust's boobs bounce considerably.
* Mii in ''Jungle de Ikou'' Gainaxes quite a bit, thanks in part to her huge rack (Mii's breasts are supposed to represent Earth's life-giving energy); this is taken to a somewhat absurd level when Mii uses her powers to turn into a giant.
* Another Studio Gainax creation, ''NeonGenesisEvangelion'', would always promise "more fanservice" in the next episode. Strangely, this was the one time Studio Gainax ''didn't'' follow this trope.
* In an odd variant, ''Brave Command Dagwon'' has this happen to Galaxy Luna's buttocks during her henshin sequence. ([[http://www.youtube.com/watch?v=u4Ajh989z0M&NR=1 Said sequence starts at 1:07.]])
* When Ukraine from AxisPowersHetalia was featured in episode 42 of the webcast, her already pronunciated GagBoobs received... well, ''[[MaleGaze quite]]'' [[MaleGaze the attention]]. And her shirt's front button popped out.
** [[http://community.livejournal.com/largetracts There's even a (NSFW, obviously) community dedicated entirely to her breasts.]]
** [[http://www.facebook.com/search/?q=ukraine#/group.php?v=info&ref=search&gid=171711217885 And another!]]
* Done in the manga of MahouSenseiNegima (and probably in the the various adapations which This Troper hasn't seen) through use of a sound effect. The sound of a bouncing breast is, strangely, [[spoiler:bwabitib]]
[[/folder]]

[[folder:Film]]
* A truly groan-worthy live action example in ''[[TransformersFilmSeries ''Transformers: Revenge of the Fallen'']]'', in which Mikaela (played by Megan Fox) bounces like Pamela Anderson on ''{{Baywatch}}'' in MichaelBay slow-motion... in what is supposed to be a dead-serious escape sequence.
** Out of place? Probably. "Groan-worthy"? ...''[[IfYouKnowWhatIMean Maybe]]''.
* The Z-grade film ''Hollywood Hot Tubs'' had Crystal, whose entire reason for existence was jogging braless in every scene, even jogging in place when standing still.
* A similar film, ''Bikini Summer'', showed an extreme close-up of jiggling before the opening credits even began rolling.
* ''BlackMamaWhiteMama,'' every time Pam Grier (or many of the other nameless women) run.
* One of the ''TombRaider'' movies had a particularly glaring example even for them, where Lara runs (in slow motion of course) at full pelt resulting in a lot of... movement that looked like it would be quite painful really.
** You would think such a "smart" woman would know what a sports bra was for.
*** Admittedly, part of that was also because they did an actual set destruction (you know, that stuff behind the bouncies) -- but yeah, they obviously were making trailer material with that particular camera angle.
* In the UweBoll film ''House of the Dead,'' Ona Grauer becomes outright pneumatic during a [[OutrunTheFireball slow motion run during an explosion]]. Like Jell-O on springs, indeed...
* In ''[[{{Zorro}} The Legend of Zorro]],'' there's a scene where Catherine Zeta-Jones runs away from dogs in a low-cut dress. It's probably not intentional, given the shortness of the scene.
* In the Adam Sandler movie ''Click'', one of the uses Sandler's character finds for [[RewritingReality a remote control that works on the real world]] is to use the "slow" function on a buxom jogger.
* Becky (Rosario Dawson) dancing on the roof of Mooby's in ''[[TheViewAskewniverse Clerks II]]''. That is all.
* {{Animalympics}}: one of Brenda Springer's scenes really could've ended slightly earlier than it did, but the animators apparently felt the shot wouldn't feel complete until all the jiggling stopped.
* Another particularly cringe-inducing example is when Caramon first realizes that Tika is a beautiful woman in the [[SoBadItsHorrible amazingly wonderful]] ''{{Dragonlance}}'' [[AnimatedAdaptation film]].
* Eliza Dushku changes out of her hospital gown and into real clothes, in ''TheAlphabetKiller''. Would ''usually'' not be that exciting, given the circumstances of that scene, but, um, [[ADateWithRosiePalms excuse me...]]
[[/folder]]

[[folder:Literature]]
* In ArthurCClarke's ''Rendezvous with Rama'', Commander Norton notes how distracting women can be in zero-gravity, particularly if "sympathetic vibrations" occur.
[[/folder]]

[[folder:Live Action TV]]
* ''AlloAllo'' -- let's just say "vibrating ice cream truck".
* ''TheBill'' -- a couple of incidents described as "Bouncy Bouncy Jo Masters".
* BBC Garden-show hostess Charlie Dimmock received a certain degree of fame for her tendency to go braless and jiggle.
** So, forty years ago, did ''children's TV'' host Susan Stranks. FetishFuel for the under-fifteen set, anybody?
* ''{{Baywatch}}.''
** Referenced in ''{{Friends}}'': "See, this is the brilliance of the show. I say always keep them running. All the time, running. Run. Run Yasmine, run like the wind."
* Long before Pam Anderson hit the beach, [[WonderWoman Lynda Carter]] perfected the art of running in slow-motion in a bustier.
* ''ThePriceIsRight.'' Seriously. Don't believe me? [[http://www.youtube.com/watch?v=noggIParXOA&NR=1 Watch this]].
* Elliot from ''{{Scrubs}}'' is pretty much the show's MsFanservice, and it often happens because she can be neurotic and excitable. A particularly notable one is when they are in a bar with J.D. and Turk playing a game, Elliot wants to play along too, saying "Oh... Do me! Do me!" while jumping up and down.
* Kelly Bundy from ''MarriedWithChildren'' often did this whenever she got excited.
**Actually, most of the women (who weren't flat-chested like Marcy or fat like the many customers in Al's shoe store) on ''Married...With Children'' gainaxed, from Peggy Bundy to the many [[ShallowLoveInterest shallow love interests]] Bud tried to score with.
* This also often happened to Chrissy Snow from ''ThreesCompany'' whenever ''she'' got excited, resulting in the coinage of the term "JiggleShow".
* ''GhostWhisperer'' has taken numerous opportunities to have Jennifer Love Hewitt run in something low-cut. In fact she seems to find a way to introduce some jiggle to every project she's in, including the bra ads.
[[/folder]]

[[folder:Music Videos]]
* Robert Palmer's ''[[http://en.wikipedia.org/wiki/Addicted_to_Love_%28song%29 Addicted to Love]]''.
* [[TheWhiteStripes Meg White drumming without a bra.]] Hypnotic, like a lava lamp.
[[/folder]]

[[folder:Video Games]]
* Rayne, the main character of the ''{{Bloodrayne}}'' series of games, and most of the other female characters in it, was notorious for it and noted by the media several times for its realistic breast physics.
* Mai Shiranui from the ''FatalFury'' and ''KingOfFighters'' series. The ''FatalFury'' anime movie, in particular, was infamous for the animators [[CensorSteam actually showing]] (very, very briefly) the inevitable wardrobe malfunctions her {{Gainaxing}} would cause in her [[{{Stripperiffic}} distinctive costume]] during fight scenes. Viz Video, who released ''FatalFury'' in the U.S., used to show her bouncing in the trailers while the narrator made enthusiastic reference to "dual-independent-suspension ninja girl Mai Shiranui". Although her design in the first few games was relatively more conservative, the anime (and the 2D JigglePhysics in the ''KingOfFighters'' videogames) resulted in her {{Flanderization}} into a walking incarnation of this trope.
* ''SoulCalibur II's'' JigglePhysics...
** Try the entire ''SoulCalibur'' series past ''II''. Also, this troper has [[strike:fond]] memories of ''Soulcalibur III''[='=]s shop girls, specifically what could be done by repeatedly hitting Triangle in their shops. Especially Valeria's. [[SoYeah So...yeah.]]
* Rouge the Bat, from the ''SonicTheHedgehog'' series boobs would bounce around ''a lot''.
* ''DeadOrAlive [[XtremeKoolLetterz Xtreme]] Beach Volleyball.'' The breast movements were synchronous until ''Dead or Alive Xtreme 2'', when they consequently lost any resemblance to actual bosoms.
** The first game even had a meter on the options screen that allowed static, semi-normal, and downright comical jiggle physics.
* ''TombRaider'''s main character, LaraCroft, gets pretty jiggly.
* ''OdinSphere'' (or should that be Spheres?). It's especially obvious when playing as Velvet, and even more obvious when battling the Queen of the Dead. It doesn't help that Velvet's particularly {{Stripperiffic}} to boot.
* ''SuperRobotWars'' does this rather extensively, despite being a video game where all the action is done by [[HumongousMecha Giant Robots]], all the bounces come from the anime-ish cut-in pictures. Very prevalent in the Alpha series, whereas you can expect any original female characters to have {{Gainaxing}} bounce. Unless your name is [[{{Pettanko}} Ibis Douglas]]. This also gets carried over to the latter handheld ''SRW'' games, such as ''J'' and ''W''. (Un)fortunately, ''SuperRobotWarsOriginalGeneration'' somewhat mellowed or stopped this practice.
** Only for ''EndlessFrontier'' to bring it back in a grand fashion: 3 of the playable characters happily show off their bosom every time you perform their LimitBreak (two of them involving a mechanism specifically designed to remove the cloth covering their cleavage), and most female bosses are happy to do this as well.
*** Funnily enough, even [[{{Pettanko}} Xiaomu]], from [[CapcomVsWhatever Namco X Capcom]] has what little cleavage she has bounce. In fact, every female character with the exception of Suzuka and Kyon Feulion have bouncy breasts.
** It starts at Alpha 2 and Alpha 3 had the most extreme version of this (I'm looking at you Selena Recital). After that, the bounce is a bit more in line with realism. By Z, the bounce is fairly tame and looks fairly natural (which is impressive given Xine's impressive rack).
* ''TalesOfSymphonia'' played with this with the well-endowed (but not shockingly so) female ninja Sheena. However, it's only most noticeable when using her as the party avatar walking around, and it's hard to spot normally (there are a couple of places where you can get a closer look and have her run in place). It's also present in the animated ending cutscreen on [[spoiler:Martel]], the credits credit Gainax themselves for said animation.
* Queen Valentina from the original ''SuperMarioRPG'' had a conspicuously long after-hit animation that consisted solely of her flinching and jiggling for a few seconds.
* April May in ''PhoenixWrightAceAttorney'' shook her stuff when flirting or when she got extremely pissed off.
** And then there's the [[SoBadItsGood hilarious]] hentai game ''Phoenix Drive'', in which female characters' breasts spontaneously Gainax every few seconds, much as humans' eyes spontaneously blink.
* Jessica from ''DragonQuestVIII'', to the point where she distracts from the action taking place on screen whether you like it or not.
* Lucia and Sheena, the unlockable characters of ''{{Contra}} 4''. That is, if you look closely at their sprites.
* Lyn, from ''FireEmblem: The Blazing Sword'', [[http://www.feplanet.net/sprites-archive-battle-animations/l/2160/2158 every time she attacks]] while wielding her end game weapon.
* In ''EliteBeatAgents,'' celebrities Norma and Isabella Carrington get stuck on a deserted island. In order to woo the animals, Isabella Gainaxes at them. How they let this (and the ''FireEmblem'' and ''SuperMarioRPG'' examples above) [[GettingCrapPastTheRadar fly in a ''second-party Nintendo game'']] is beyond me.
* In ''MetalGearSolid 4'', [[spoiler: the player can induce this manually by jiggling the SIXAXIS controller during cutscenes.]]
* No mention of ''Metal Gear'''s PSP {{Spinoff}} ''Metal Gear Ac!d 2''? They even gave you ''3D goggles'' for it.
* The ''{{Tekken}}'' spinoff [[SoBadItsHorrible ''Death By Degrees'']] has "breast physics" as its (only) selling point (along with ClothingDamage in boss fights).
* In ''SkiesOfArcadia'', Belle, one of the crew members you can recruit, is rather... bouncy. Especially since she's also a GenkiGirl and source of much [[InnocentFanserviceGirl Innocent Fanservice]]. Did we mention you can end up talking to her while she's [[DoesThisRemindYouOfAnything polishing an artillery shell]]?
* Fiona from ''HauntingGround'' suffers this. Especially noticeable when you unlock some of her other very revealing outfits.
* Nearly every female character that isn't a {{Pettanko}} in ''{{Disgaea}}''.
* ''WorldOfWarcraft'' features Gainax physics in the ears of the elven races, though more prominently in the Night Elves than the Blood Elves (ears are bigger).
** Their boobs move around quite a lot too. But actually, the boobs that bounce around the most in WorldOfWarcraft are on female ''undead''. Sort of justified as they probably aren't... Attached properly anymore.
*** They even have a /silly that implies that they were originally attached ''to someone else''. ("Yes, they're real. They're not ''mine'', but they're real.")
* Nidoqueen in ''{{Pokemon}}'' actually displays this in the Stadium games upon release and before executing a physical attack.
* The World in her win animation in the puzzle game ''Magical Drop''.
** Magical Drop ''II''.
** In ''Magical Drop III'' (and to a lesser extent in the previous titles) nearly all of the female characters get this to some extent, but it's in nearly every animation for The World.
* This happens during the opening cutscene of ''NamcoXCapcom''. Really establishes the character being from ''SoulCalibur''...
* Early ''GoldenSun DS'' gameplay footage shows at least one summon with gainaxing.
* ''BlazBlue'' has Litchi, who has gorgeous pair that bounces even when she's seemingly standing still. There's a reason she's called [[FanNickname Boobie Lady]] you know.
* [[TalesOfVesperia Estelle wishes she could bounce like]] [[MsFanservice Judith]].
* Kongiku from ''[=~Muramasa: The Demon Blade~=]'' has very large breasts that tend to wobble and jiggle constantly, even when she's not doing much other than standing there, breathing. The jiggle isn't as exaggerated as the most extreme examples of this trope, but is quite noticeable.
* The priestess Rao in ''{{Okami}}'' jiggles wildly every time you meet her, [[spoiler:including after she's [[DemonicPossession possessed]] by the demon Ninetails]]. [[ChivalrousPervert Issun]] rarely refers to her as anything but "busty babe", even to her face.
[[/folder]]

[[folder:Webcomics]]
* Nauseatingly parodied in [[http://www.ctrlaltdel-online.com/comic.php?d=20061025 this]] ''CtrlAltDel'' strip.
[[/folder]]

[[folder:Western Animation]]
* Jessica Rabbit from ''WhoFramedRogerRabbit''. Her breasts were purposely drawn to bounce in the opposite rhythm of a normal female's chest while walking; she bounces down when a real person would bounce up, and vice versa.
* World renowned cartoon sex idol ''BettyBoop'' was also known to do this in certain cartoons.
* ''TinyToonAdventures'' seemed to have a little fun animating a female anthro bear character called Julie Bruin ([[InkSuitActor based on, and voiced by]], comedienne and singer Julie Brown) this way in one episode. [[http://www.youtube.com/watch?v=xirDE57RlDA Here's proof.]]
* Believe it or not, ''TeenTitans'' got away with doing this to Starfire from time to time.
* And ''TheBackyardigans'' does it with Tyrone's '''ears''', particularly in [[http://www.youtube.com/watch?v=L-rPOcm6clk&feature=related season 1's opening (who cares if it's in Spanish? Just pay attention on the bouncing)]].
** The "Caveman's Best Friend" episode has Tyrone control the bouncing of his ears, even though it looked more like flapping during that episode.
* Several episodes of ''KingOfTheHill'' seem to have a rather excessive amount of closeups of Luanne's breasts while they jiggle.
*Victor's mum from ''TheCorpseBride'' is subject to this trope, although it's hardly your typical case seeing as how she's middle-aged and overweight.
* ''TrippingTheRift'''s resident MsFanservice Six was animated this way.
* Ralph Bakshi's ''FireAndIce'' features a very early (1983) pair of life-drawn (but hugely amplified) {{Gainaxing}} breasts on [[EverythingsBetterWithPrincesses Princess Teegra]].
* Shadowcat from ''WolverineAndTheXMen'' had her breasts bounce when she went after the CreepyChild in the "Battle Lines" episode.
* ''[[TheLittleMermaid Ursula]]'', of all characters, got an inordinate amount of time spent on her to make sure she jiggled realistically.
[[/folder]]

[[folder:Real Life]]
* Scientists are looking for ways to transform the sheer kinetic energy provided by bouncing breasts into [[http://www.treehugger.com/files/2008/06/bra-power-breast-charge-ipod.php stored electric power]]. At the very least, an ample chest could provide a source of current for your iPod.
* Other scientists (and programmers) have created the [[http://www.shockabsorber.co.uk/bounceometer/shock.html simulator]] a level or two below the link to illustrate
## How well their firm's sports-bra works
## How well they know the physics of moving breasts, and how to simulate them in code
## How many hits they can get from men with no intention of ever buying a sports-bra, ever.
** Note: not work-safe in its default mode. Work-safe, maybe, if you eliminate the "nude"/photo example. Even less work-safe in wire-frame mode, for some of us at least.
* [[http://frigginrandom.com/wp-content/uploads/2008/09/tightjeans.gif This.]]
**[[http://www.youtube.com/watch?v=d3i8wfgkOlA And this.]]
[[/folder]]

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