[[quoteright:288:[[Anime/{{Gravion}} http://static.tvtropes.org/pmwiki/pub/images/gainaxing_1.jpg]]]]
[[caption-width-right:288:[[{{Franchise/Transformers}} One shall stand, one shall fall...]]]]

->''"The breasts of damn near every single woman in this game are their own interactive objects, with their own flavor texts and conversation trees attached -- usually leading to your guy grabbing those breasts (without permission and without protests)!"''
-->-- '''[[https://www.youtube.com/watch?v=ya8hyJnJzBU George Weidman]]''' on ''{{VisualNovel/Policenauts}}''

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

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

The term was coined by fans some time before 1993 and makes reference to the anime production Creator/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 woman from the Gainax anime ''Anime/OtakuNoVideo'' inspired a tongue-in-cheek unit of measurement for Gainaxing: one full bounce is apparently equal to one "MistyMay".

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

For a live action TV series built around this, see JiggleShow. For real time generation of jiggling movement in video games, see JigglePhysics.

Do not confuse this with a GainaxEnding - there it's the individual parts of the viewer's brain that gets contorted in different directions.



[[folder:Anime & Manga]]
* Manga/{{Airmaster}} Mina has plenty of this but she's a Subversion of MsFanservice and her [[GagBoobs figure]] is played mostly for laughs as her breasts tend to bounce out of sync with the rest of her body and the movements are extremely exaggerated
* In ''VisualNovel/AkaneIroNiSomaruSaka'''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.
* Yurika in ''LightNovel/{{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.
* The title character in ''Amazing Nurse Nanako'' falls prey to this, making an otherwise well plotted series difficult to watch.
* When Ukraine from ''Webcomic/AxisPowersHetalia'' was featured in episode 42 of the webcast, her GagBoobs received, well, ''[[MaleGaze quite]]'' [[MaleGaze the attention]]. And her shirt's front button popped out ([[CallBack followed by a later scene where she tries to sew the button back in place]]). ''And'' her boobs make an audible bouncing noise when she moves (which Latvia refers to as "booby bounce" in the English dub).
* Miyuki in ''Anime/{{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.
* Played for FanDisservice in ''{{Manga/Berserk}}'' with Casca, as the only time we see this happen is [[spoiler: during her rape by Femto, where the gainaxing actually serves to show how violently she's being assaulted]].
* In chapter 117 of ''Manga/BlackCat'', one panel has Saya Minatsuki dodging Creed's slashes, causing her breasts to swing in visibly different directions. She's far from the bounciest female in the series, but she does seem like the kind of girl that would go without a bra in the comfort of her own home (which is where she was when that asshole Creed barged in on her).
* PlayedForLaughs in the animated ''omake'' of ''Manga/BlackLagoon'', when Rock wakes up [[GenderFlip as a woman]]... "WITH HUGE BOOBS!".
** In the series proper, Revy's very acrobatic GunFu causes this to occur during her fight scenes. More noticeable in some than others. At least in her case it's justified as it's canon she doesn't wear a bra.
* In ''Manga/{{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}}.
* Bouquet in the ''[[TheAnimeOfTheGame Blue Dragon]]'' series. Combined with MsFanservice, as her powers only activate when she's naked.
* Just about any female character in the various ''Anime/BurnUp'' animes.
** ADV's release of Burn Up Excess featured a toggleable alternate subtitle track that actually displayed a tally of how many boob-bounces are shown on screen of each character's chest!
* Rosette does this in the third episode of ''Manga/ChronoCrusade'' -- unfortunately bad animation makes it look as if she had bags filled with water instead of breasts.
* Kyou Fujibayashi of ''VisualNovel/{{Clannad}}'' Gainaxes like mad in the opening credits of the first season, ''while bouncing a basketball''.
** Kotomi also does so in the BaseballEpisode.
* This happens to Milly and Shirley during one of the SchoolFestival activity episodes in ''Anime/CodeGeass'' and to Kallen, the most noticeable example being her encounter with Suzaku on Kamine Island. You'd think that Kallen, having one of the larger chests of the female characters featured on the show as well as being the most physical girl, would get ''a lot'' more of this during the action sequences but the total count reaches no more than a handful.
** Well, [[WeirdScience any more than a handful is a waste.]]
* ''Anime/CowboyBebop'' has the character Faye Valentine, who is breathtakingly beautiful with gigantic pneumatic breasts that seem to have minds of their own. Canon indicates that she does this on purpose [[DistractedByTheSexy to distract men]]. On one occasion, she wears a perfectly normal evening gown.
* Centorea in ''Manga/DailyLifeWithMonsterGirl''. Her breasts bounce a lot thanks to their size and her lack of a bra. This actually turns out to be a problem in Chapter 29, as the bouncing keeps throwing off her aim while jousting.
* Junko Asagiri from ''Manga/DesertPunk'' has numerous instances where her huge breasts move out of sync with the rest of her body. In some cases, usually when she's trying to seduce someone, her breasts bounce on their own.
* PlayedForLaughs in episode 10 of ''LightNovel/TheDevilIsAPartTimer'' where the bouncing of Chiho's breasts is accompanied by the sound of timpanis.
* A certain animation team in the rotation for ''Anime/DigimonSavers'' used this technique on Rosemon, and it's probably not a coincidence that they animated [=BioLotusmon=]'s only appearance. It's worth noting that before ''Savers'', the only minor use of this trope was in the second ''Tamers'' movie -- Sakuyamon's bounce a bit when she's freed from a Parasimon tentacle.
* ''Anime/DigimonXrosWars'' has Lilithmon and her boobs (she even fondles with them), and then there's Mervamon for the good guys (the opening even has her boobs bounce!), who even fires lasers from her breasts.
* Practically every female role in ''Anime/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.
* Happens a bit in the ''Manga/FairyTail'' anime with the various girls, most notably [[spoiler: [[ShesAllGrownUp Edolas!Wendy]]]].
* ''LightNovel/TheFamiliarOfZero''
** Siesta pictured [[http://static.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. Used to great hilarity in one episode when the gang is trapped in a cave. They hear something approaching fast and prepare for a fight, until Saito realizes exactly what that sound is with a priceless look on his face while the viewers get the obligatory chest shot of the approaching Siesta (who's wearing the Sailor Fuku outfit Saito bought earlier).
** Not to mention Kirche the Ardent. Until Tiffania's debut she was the most buxom charcater in the series and do often this in the first season.
** Siesta is ''nothing'' compared to Tiffania, who barely has to ''move'' to set her breasts bouncing around like Film/{{Flubber}} and is often subject of GagBoobs. In the closing theme for the third season, they shift like a waterbed while she's standing still.
* Haruhara Haruko in ''Anime/{{FLCL}}''. It is Gainax after all. Of particular note is the random bunny suit she wears during the big battle in episode 5.
* This happens in episode 19 of ''[[Manga/FullmetalAlchemist Fullmetal Alchemist: Brotherhood]]''; for unexplainable reasons beyond pointing out that Havoc likes big boobs, Lust's boobs bounce considerably.
* Angela, an American visitor to ''Manga/{{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.
* ''Anime/GhostInTheShellStandaloneComplex''. The first view we have of the HospitalHottie who has come to give Major Kusanagi a new cyborg body is her bouncing breasts. The fanservice is increased tenfold when she starts making LesYay comments while [[CreepyPhysical examining]] the BiTheWay Major. [[spoiler:Subverted in that she turns out to be [[SickbedSlaying an enemy planning to kill her]].]]
* Almost every female character in the anime ''Manga/GirlsBravo''. First seen with Miharu while she and Yukinari are running away from the mob of women on her homeworld, Seiren, during the first episode.
** The opening scene of the 13th episode shows Kosame shadowboxing while in the shower; during which her breasts bounce with each of her strikes.
* ''Manga/GoldenBoy'' did this quite a bit, especially in the first episode (from the owner of a computer software company).
* Plentiful in ''Anime/{{Gravion}}'' (which provides this page's picture), especially with [[MsFanservice Mizuki Tachibana]], who bounces considerably with the slightest movement, even ''swallowing''. Gainaxing is a signature of Gravion's creator, Creator/MasamiObari, present in his works, including the ''VideoGame/FatalFury'' anime adaptions and ''VideoGame/VoltageFighterGowcaizer'', in which it's put to the utmost extreme.
* Rushuna Tendo, every episode of ''Anime/{{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. And for extra Gainaxing, she uses her bounce to execute an UnorthodoxReload, which always gets plenty of MaleGaze.
* While not exactly as flagrant, Murrue Ramius of ''[[Anime/MobileSuitGundamSeed 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 was also the first woman in the ''Franchise/{{Gundam}}'' franchise to have her jiggle ''in the opening credits of the actual series itself''. She was replaced in the HD Remaster by Fllay Alster. The [[Film/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.
** "They wounded the burst-proof battleship in order to sway the heart of the captain." - ''{{Moetan}} II, volume 1'' (the book). Obviously, the word "heart" in the Japanese translation can also mean "breasts".
** Fllay also displayed quite a big of bounce in the flashbacks to [[http://fyeahkirafure.tumblr.com/post/14205211922 the sex scene with Kira]]
** Parodied in ''Anime/GundamBuildFighters'' episode 17. A DirtyOldMan really likes Ramius' bounce.
* Parodied and {{lampshade|Hanging}}d in an anime-original RPGEpisode of ''Manga/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.
* Generally all the girls in ''LightNovel/HighSchoolDXD'' (especially Rias and Akeno), except the flat-chested Koneko and Asia, with boob bounce sounds.
* ''Manga/HighschoolOfTheDead'' combines Gainaxing with BulletTime. [[http://www.youtube.com/watch?v=10x6aMvspis ''And it is ridiculously awesome!'']] According to [[http://www.reddit.com/r/anime/comments/ngelc/speed_of_sound_15_speed_of_boobs/ uncredited analysis]], the speed of the breasts in that shot [[http://i.imgur.com/etyLu.jpg exceeds 1800m/s]]!
* ''VisualNovel/HigurashiWhenTheyCry'' had this happening to Mion [[spoiler:(really Shion)]]. Like every other {{fanservice}} trope used, [[FanDisservice it came off as seriously creepy]].
* Mii in ''Anime/JungleDeIkou'' 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.
* Parodied in ''Anime/HareGuu'' 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]] (NSFW).
* Izumi in ''Manga/KemekoDeluxe'', all the time.
* ''Anime/KillLaKill'' has this with Ryuko and Satsuki, ''especially'' during their transformation sequences..
* In ''Anime/KirbyRightBackAtYa'' 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.
* Yuriko deliberately does this to Daichi while on the train in episode 6 of ''Manga/KotouraSan''. He {{ignore|TheFanservice}}s it, much to her frustration.
* Happens at one time or another to most of the female cast of the anime releases of the ''VisualNovel/KoihimeMusou'' franchise who have large breasts, especially to Kannu. Ryuubi even gets to do it on purpose later in the series to [[DistractedByTheSexy lure someone into a trap]].
* ''LightNovel/LadiesVersusButlers'' is full of this, having ample fanservice moments. Sernia Iori Flameheart in particular, she even gets the sound effects, generally the other girls don't.
* The opening credits of ''Landlock''.
* [[OtakuSurrogate Patricia Martin]] displays it during while cheerleading in ''Manga/{{Lucky Star}}'''s opening DancingTheme.
* Averted in ''Franchise/LoveLive'' as Nozomi's GagBoobs aren't bouncing in any of the episodes. Notable in OVA when Nico pummels her boobs in frustration and they still manage to stiffly stay in shape.
* You'll see Lara's breasts in ''Anime/LupinIIITheSecretOfTwilightGemini'' bouncing independently during both of her chase scenes, since [[MaleGaze the camera stays focused on her boobs.]] Also seen near the end, when [[spoiler: Bultokari]] saves her with his pick-up truck.
** Fujiko usually in ''Anime/LupinIII'' series.
* Chapter 95 of the manga ''Manga/{{Mx0}}'' plays this trope for satire with a magical liquid that makes some (already extremely buxom) girls' breasts experience only 1/6 normal gravity. The result is a ''lot'' of bouncing, first from falling, then from wind, then an earthquake.
* ''Anime/MacrossFrontier'' features a whole raft of characters with sufficiently Gainaxed breasts, including Sheryl and the Miss Macross Frontier contestants (which makes [[ACupAngst 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.
* Mune-mune ''Anime/MagicalShoppingArcadeAbenobashi'' has large breast that bounce frequently and usually with no movement from the rest of her body
* Caldina [[InvokedTrope does this deliberately]] in ''Manga/MagicKnightRayearth'' whenever she brags about her body.
* Done in ''Manga/MahouSenseiNegima'' through use of a sound effect. The sound of a bouncing breast is, strangely, [[spoiler:bwabitib]].
* ''Manga/MaicchinguMachikoSensei'' was perhaps the first anime to do this, although the gainaxing in that show is tame by today's standards.
* Mai from ''Anime/MaiHime'' 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]].
** Strangely enough, while attention is frequently called to her [[{{Pettanko}} lack of a chest]] in the [[Anime/MaiOtome original series]], Arika in ''Anime/MaiOtomeZwei'' starts bouncing quite noticeably, especially whenever she prepares to use her signature move. One could argue, though, that she has filled out in the one year since the end of the series.
* ''VisualNovel/MajiDeWatashiNiKoiShinasai'' has Momoyo, whose BoobsOfSteel defy gravity.
* In the ''Anime/MakaiSenkiDisgaea'' 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.
* [[MsFanservice Kurokami Medaka]] has this ''all the time'' in the AnimatedAdaptation of ''Manga/MedakaBox''. Complete with the bouncy sound effect. Well, it ''is'' a Creator/StudioGainax anime...
* Chu's entire entourage in ''Manga/{{Mouse}}'', even the flat chested one.
* Mai Kawakami in the animated adaptation of ''LightNovel/MyriadColorsPhantomWorld'' is probably the bustiest girl on the show, and jiggles quite a bit. In the first episode Mai is the last contestant in a limbo contest. Unfortunately, she's also in danger of losing because her large breasts won't fit under the rope. To get under the rope she starts bouncing her breasts so that when they reach their lowest point she slips under the rope. Note that this would really only work in real life if 1) she wasn't wearing a bra and 2) her breasts were made of jello.
* ''Manga/OnePiece'':
** The seventh 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.
** Used again slightly more subtly during the Spa Island {{Filler}} Arc. Also [[StupidSexyFlanders Chick Ivankoff]]. In the latter case, whether it's {{Fanservice}} [[AttractiveBentGender or]] [[BrainBleach not]] is up to you.
** Used later in the Marineford Arc with scenes of Hancock's boobs bouncing every time she moved around.
** Also used in the tenth ''One Piece'' movie when Nami runs down some stairs.
* The sheer quantity of gainaxing found in the anime ''Anime/PlasticLittle'' inspired [[Creator/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.
* Check the BeachEpisode of ''Anime/PleaseTeacher''.
* ''Anime/QueensBlade'' episode nine introduces Cattleya, the franchises bustiest character with a 120cm bust size. Despite the size her of her breasts, which would be very heavy, in that specific episode they are given extremely floaty animation. In one battle, blocking an attack manages to bounce them so high they cover her face.
* ''LightNovel/RailWars''. From both the main girl, but [[GagBoobs Haruka]] is the most focused on. For example, during the track scene in school, the camera goes to Shou, confirming his athletic ability, whereas the camera goes to Haruka panting and her breasts bouncing everywhere.
* Every female character that appears in the various ''Manga/RanmaOneHalf'' 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. May be at least partly [[AuthorAppeal Creator Appeal]], on the part of animation director Atsuko Nakajima, who was so infamous for drawing her characters this way in the mid-90s that it earned her the nickname "Knockerjima".
* Studio Gainax is responsible for animating the ''[[Anime/CuteyHoney Re: Cutie Honey]]'' {{O|riginalVideoAnimation}}VAs. Hoo boy, is there ''ever'' Gainaxing in that show.
* The eponymous Rio from ''Anime/RioRainbowGate'' has very bouncy assets, which get ample emphasis in the show. The fact that she dresses in an extremely revealing manner for a casino croupier, [[BareYourMidriff baring her midriff]] and [[DangerouslyShortSkirt wearing an ultra-short skirt]], only exacerbates this.
* ''[[Anime/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.
* Kurono Kurumu in ''Manga/RosarioToVampire''. The movement of her breasts even produces audible sounds! And in episode 4, Kurumu's fat stalker (or rather, his belly).
* Surprisingly, several girls in the ''Manga/{{Saiyuki}}'' anime jiggle around in action, even though the show is mostly [[CastFullOfPrettyBoys fangirl fodder]]. Then again, the franchise was originally marketed as {{Shonen|Demographic}}.
* [[GagBoobs Nodoka]] of ''Manga/{{Saki}}'' says hi. Just the simple act of walking could get her breasts jiggling.
** A critic from Website/AnimeNewsNetwork once noticed that her entire wardrobe is sewn in just the right way for her shirts to perfectly cup her chest.
* ''Manga/SakuraTrick'' does that on Haruka's self-declared D-cups. Kotone sometimes has this treatment.
* Parodied in ''Anime/SamuraiChamploo'' when small-chested Fuu decides to carry a couple of cherry bombs by [[VictoriasSecretCompartment 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.
* PlayedForLaughs in ''Manga/SeitokaiYakuindomo'' with Aria Ichijou. Being MsFanservice, her boobs jiggle on occasion, often to emphasize how [[ACupAngst jealous the other girls are of her size]]. At one poimt, she ''willed them to bounce on their own'' when the discussion turned to them.
* [[HighlyVisibleNinja Kasuga]] from ''VideoGame/SengokuBasara'' series (anime) not only gets bigger boobs than in the game, but they visibly bounce around when she moves quickly. Seeing her status as MsFanservice, it's not surprising.
* Margery Daw in ''LightNovel/ShakuganNoShana'''s FestivalEpisode.
* ''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 TokenMiniMoe.
* Ikumi Mito in the anime of ''Manga/ShokugekiNoSoma'', especially in her usual bikini-top getup. Just sticking her arm out and leaning over ''slightly'' is enough to send her breast into a frenzy!
* The ''VisualNovel/{{Shuffle}}'' OVA had Sia and Asa Gainax within the first three minutes. Then when Sia's dad replaces the water in the pool with eels, Nerine does as well.
* Happens a few times in ''LightNovel/{{Slayers}}'', with the leading contender being the [[GagBoobs balloon-breasted]] Naga the Serpent; it almost got her killed once, her rack sprang back into shape after being pressed against a wall, nearly launching her over a cliff. Surprisingly, Amelia, one of the protagonists, is quite busty (to the point that [[ACupAngst Lina]] hates her for it), but she isn't subjected to this trope, save for the ''[[NonSerialMovie Slayers Premium]]'' movie, where it's actually used as a part of her [[{{Flanderization}} flanderized]] [[TheChewToy chew toy]] status. Newer anime seasons also made up for this by having Amelia be subjected to breast-squeezing CombatTentacles in one battle, and then having her [[TheissTitillationTheory tunic partially ripped from her breasts]] after another battle.
* Yoko, and Kittan's three sisters (who come in small, medium and large for your viewing pleasure) in ''Anime/TengenToppaGurrenLagann''. Guess who it's made by. In fact, [[http://www.youtube.com/watch?v=FXhU3H8KPZk 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.
* Mikuru Asahina, the {{Moe}} character in ''[[LightNovel/HaruhiSuzumiya The Melancholy Of Haruhi Suzumiya]]'', displays Gainaxing, particularly in the opening credits.
-->'''Kyon''': ''[[CrowningMomentOfFunny Too many beach balls]]!''
** Also very evident in [[http://www.youtube.com/watch?v=c5G5bD2Do-k the ending credits]], especially at 0:13-0:16 (she's on the right).
** It's even {{lampshade|Hanging}}d in a Season 2 dub [[HilariousOuttakes outtake]]: "Look at these things, they move ''independently'' of each other!"
* Done hilariously in the BeachEpisode of ''[[Franchise/TokimekiMemorial Tokimeki Memorial Only Love]]'' with swimming team captain Koayu Utsumi, whose GagBoobs jiggle just from her merely looking around, complete with sound effects (and it doesn't help that it's getting all the attention of all the guys around, which she hates so much, and especially since she's on lifeguard duty at the time).
* ''Manga/ToLoveRu'' seems overly fond of this. Espically Lala. Just watch the OVA opening, 1 minute and 30 seconds of pure bounce.
* Even one of the more serene shows, ''Anime/UmiMonogatari'', gets a chance to indulge in this trope. Oshima, Kanon's rival, is flaunting her own bust size, when [[MessianicArchetype Marin]] comes running up to greet her. Marin, already halfway to being an InnocentFanserviceGirl, is not wearing a bra. The results leave Oshima stunned.
* The anime of ''VisualNovel/UminekoWhenTheyCry'' gave most of the women and girls a bad tendency to do this, which would be fine if this were a comedy series. Unfortunately, Umineko [[KillEmAll is]] [[MindScrew not]] [[ParanoiaFuel a]] [[PsychologicalHorror comedy series]]. Poor Shannon has the worst of it. Every time she makes a sudden movement or reacts to something, her boobs also react, with a single bounce.
* ''Anime/ValkyrieDriveMermaid'' has a lot of it. Let's just say if you have anything approaching a decent cup size, you're going to be bouncing all over the place.
* Done poorly with Bekira in ''LightNovel/WagayaNoOinarisama''. Kind of {{lampshade|Hanging}}d 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.
* While Asuka in ''Anime/NeonGenesisEvangelion'' generally doesn't jiggle due to a thirteen year old not really having anything that ''can'' jiggle, she gets an inexplicable cup size upgrade and visibly jiggles when Shinji unintentionally rips her gown open in ''End of Evangelion''[='s=] [[DudeShesLikeInAComa infamous]] [[ADateWithRosiePalms hospital scene]] (done by Gainax, of course). A straighter example occurs in ''Anime/RebuildOfEvangelion''[='s=] second movie, when Mari is enjoying her new plugsuit and playfully jiggles her breasts [[MaleGaze while the camera focuses directly on them]]. The third movie ups that further with Mari's breasts [[MoodWhiplash animatedly bouncing around while her Eva is sprinting during an otherwise dead-serious scene]], complete with the camera looking at her from below so that her chest, face and whatever she's looking at are all in the frame.
* Exaggerated to the point of ridiculousness in ''LightNovel/TheAmbitionOfOdaNobuna'', where Katsuie's boobs manage to jiggle in full BreastPlate. Yes, apparently her boobs are so ridiculously bouncy they can ''bend metal''.

[[folder:Eastern Animation]]
* Animation/AachiAndSsipak has a female character that does this throughout the movie to hilarious effect. At one point, she somehow manages to find herself strapped to a motorcycle, riding on her rack, while bouncing down some stairs.

[[folder:Films -- Animation]]
* Ralph Bakshi's ''WesternAnimation/FireAndIce'' features a very early (1983) pair of life-drawn (but hugely amplified) bouncing breasts on [[EverythingsBetterWithPrincesses Princess Teegra]].
* Jessica Rabbit from ''Film/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. And they go "boing"!

[[folder:Music Videos]]
* The Caramella Girls in the official [[CaramelldansenVid Caramelldansen]] music video, though it can be hard to spot due to the screen also bouncing.
* As mentioned on the GagBoobs page, the video for [[https://www.youtube.com/watch?v=HMUDVMiITOU "Turn Down For What"]] features this trope taken to an extreme, where a middle-aged woman's breasts move (independently!) in time with the song's beat.

* In ''Pinball/{{Baywatch}}'', the MatchSequence has the camera pan down a line of female Baywatch lifeguards wearing sexy swimsuits. An operator configuration enables jiggling breasts.

[[folder:Video Games]]
* ''VideoGame/AkatsukiBlitzkampf'' gives us Marilyn Sue, who's popular with fans both for her powerful, hard-hitting fighting style and for her huge, ''huge'' jugs that bounce and swing every which way as she smacks around her opponents.
* ''VideoGame/BlazBlue'':
** [[ChineseGirl Litchi Faye-Ling]], the resident MsFanservice, has an [[GagBoobs extremely large pair of knockers]] that bounce even when she's seemingly ''[[UpToEleven standing still]]''. There's a reason she's called "[[FanNickname Boobie Lady]]", you know.
** Also, fellow MsFanservice Makoto Nanaya has [[http://e621.net/data/6e/4c/6e4cdf316090dfb13e60228e40feadfd.gif?1304049473 this]] going on, although to a [[{{Pun}} lesser]] extent. As an added bonus, if her theme music is playing in the background, her boobs bounce to the rhythm!
* Mai Shiranui from the ''VideoGame/FatalFury'' and ''VideoGame/TheKingOfFighters'' series. The ''VideoGame/FatalFury'' anime movie, in particular, was infamous for the animators [[CensorSteam actually showing]] (very, very briefly) the inevitable wardrobe malfunctions her bouncing breasts would cause in her [[{{Stripperiffic}} distinctive costume]] during fight scenes. Viz Video, who released ''VideoGame/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 ''VideoGame/TheKingOfFighters'' videogames) resulted in her {{Flanderization}} into a walking incarnation of this trope. In fact, the latest incarnation of the ''King of Fighters'' takes this to SerialEscalation levels. Even in the NeoGeoPocket games where she appears her breasts jiggle!
* Every single game from Japanese HGame maker Illusion. Being strictly h-games they generally have controls that affect the size, shape, firmness, effects of gravity... Surprisingly, somehow they seem to have averted (mostly) in their latest game which uses a different, much more realistic ([[UncannyValley for varying degrees of realistic]]) engine versus their traditional anime-esque style games. There is still bounce, but much less Gainaxey.
* Kongiku from ''VideoGame/MuramasaTheDemonBlade'' 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.
* Dr. Naomi in ''VideoGame/NoMoreHeroes2DesperateStruggle'' has a preposterous bounce animation triggered when the player speaks to her in the laboratory. The self-awareness of this is heightened by Naomi's comment, "Quit staring at me! I know what you're thinking-- and NO!", a nod to the fact that she appears to have ''grown'' since the first game in the series and been put in an impossibly small top. It is a simply wonderful piece of FanService.
** It's also found in the [[http://www.youtube.com/watch?v=gqaz1kDz14w intro]] to Pure White Lover Bizarre Jelly, a parody of {{Magical Girl}}s and {{Moe}}.
* The priestess Rao in ''VideoGame/{{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.
** It's mentioned in the game's official art book that one of the programmers created a "bounce and sway program" with "great attention to detail" to get Rao's breasts to jiggle just right.
* April May in ''VisualNovel/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.
* ''VideoGame/ResonanceOfFate'' gives us [[MsFanservice Countess Barbarella]], is seen only once in the game while eating. While she does so, her breasts bounce enough to make the laws of physics cry in a corner. [[HandsomeLech Vashyron]] has a hilarious internal monologue about her [[UnusualEuphemism bunker busters]].
* Practically used as a selling point in the ''VideoGame/SenranKagura'' series. The boobs may as well be made of jello.
* ''VideoGame/StarOceanTheLastHope'' has Myuria, whose breasts have LOTS of room to move about.
* Queen Valentina from the original ''VideoGame/SuperMarioRPG'' had a conspicuously long after-hit animation that consisted solely of her flinching and jiggling for a few seconds.
** It's notable that the jiggling part lasts about 3 times longer than the flinch.
** Flurrie from ''VideoGame/PaperMarioTheThousandYearDoor'' has a ''sound effect'' that goes with her breasts bouncing.
* ''VideoGame/SuperRobotWars'', despite being a video game where all the action is done by [[HumongousMecha Giant Robots]], has rather extensive bouncing in the anime-ish cut-in pictures. Very prevalent in the [[VideoGame/SuperRobotWarsAlpha Alpha series]], where you can expect any original female character to have Gainaxing bounce, unless her name is Ibis Douglas. This also gets carried over to the latter handheld ''SRW'' games, such as ''J'' and ''W''. (Un)fortunately, ''VideoGame/SuperRobotWarsOriginalGeneration'' somewhat mellowed or stopped this practice.
** Only for ''VideoGame/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 Xiaomu, from [[VideoGame/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).
** In fact, there's a fan-made montage of these cutins in ''VideoGame/{{Super Robot Wars Z}}2: Saisei-Hen'', set to [[http://www.youtube.com/watch?v=SWHAeBODHec DYNAMITE EXPLOSION]]
* ''Franchise/TombRaider'''s main character, Lara Croft, gets pretty jiggly. Especially in the sixth game in the series, ''[[VideoGame/TombRaiderTheAngelOfDarkness The Angel of Darkness]]''.
* As of installment #13.5, ''Hopeless Masquerade'', even VideoGame/{{Touhou}} has gotten in on the action. Although only one character actually bounces.
* Selvaria of ''VideoGame/ValkyriaChronicles''. Most of her major scenes focus either on her flaming blue badassity, or her.. um, "talents", and the jiggling is truly astounding when the camera's on them. One particularly dramatic scene suffers because of the focus on her breasts bouncing around in ''different directions''.

[[folder:Web Comics]]
* In a ComicBook/WonderWoman parody strip, she and ComicBook/{{Superman}} are fending off some bad guys shooting at them. Superman stands in his trademark pose while the bullets bounce off of him, and he asks Diana why she blocks with her bracelets if she's invulnerable like he is. She stops blocking and lets the bullets hit her. They bounce harmlessly off her chest...but her breasts jiggle at every hit. The bad guys catch on and soon they ''all'' start shooting at her breasts to [[EatingTheEyeCandy enjoy the show]]. She simply looks at Clark with an "[[AllMenArePerverts I rest my case]]" expression. He concedes and she goes back to blocking.

[[folder:Web Original]]
* On ''WebAnimation/ShutUpCartoons'' we have a few examples:
** Oishi from ''Oishi Highschool Battle'' is gainaxing all the time. Oishi breasts are actually prehensile, on occasion the reach out and smack people, or fire laser beams from her nipples.
** A sequence in ''Samurai Daycare'' opening is a close-up of asymmetrical breast-jiggle.
* Appears to have been attempted in ''WebAnimation/AcedemySugoiSeiun'' when Sakura is running to school, but due to the animation being only 2 frames it's hard to tell.

[[folder:Western Animation]]
* Mrs. Beady from ''WesternAnimation/{{Barnyard}}'' and ''WesternAnimation/BackAtTheBarnyard'' has her boobs jiggle, even when she gets up from the chair.
* Manuela from the ''Les WesternAnimation/{{Lascars}}'', even when she does the smallest movement like turning her head, her boobs move.
* In the ''WesternAnimation/AmericanDad'' episode "Helping Handis", Steve [[ItMakesSenseInContext ends up growing a pair of boobs as a result of an experimental steroid given to him by his dad]]. And Steve's newly developed breasts jiggled quite a lot throughout the episode.