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[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/hairboner_2065.jpg]]
[-[[caption-width-right:300:[[VideoGame/PokemonGoldAndSilver Silver]] gives IdiotHair [[SomethingElseAlsoRises a whole new meaning]].]]-]
[-[[caption-width-right:300:[[http://luo-qin.deviantart.com/art/Soulsilver-Wear-It-Again-189878130 Image]] courtesy of [[http://luo-qin.deviantart.com/ luo-qin]].\\
Used with permission.]]-]

Either it's unconscious telekinesis or itsy-bitsy teeny-weeny muscles (or just the animators being weird!), but however it's managed, the character's hair is independently mobile and responsive to their moods. Sometimes it's nothing more than a pigtail that sticks out straight in defiance of gravity when the character's shocked or frightened, but it can go so far as fully prehensile braids that shape themselves into hearts, question marks, and other iconic forms.

See also its sister trope, ExpressiveMask, and its (occasionally) more violent cousin, PrehensileHair. See also ExpressiveEars, ExpressiveAccessory. Can be related to KaleidoscopeHair if the hair changes color.

----
!!Examples:

[[foldercontrol]]

[[folder:{{Anime}} and {{Manga}}]]
* In ''Manga/{{Naruto}}'', it happened with Kushina's [[spoiler:(Naruto's mother)]] hair. Whenever she handed out violent retribution for people making fun of her (her round face and red hair), earning the nickname "Red Hot-Blooded Habanero", her hair floated wildly in the air. Furthermore, Naruto cover for chapter 503 [[http://naruto.wikia.com/wiki/File:Chapter_503.png]] features Kushina's hair resembling Kyuubi's tails, symbolizing her status as [[spoiler: the previous Kyuubi Jinchuuriki.]]
* Alucard from ''{{Hellsing}}'' chose his form as the vampire we see, so when he gets bit on the crazy bloodlust side, his hair writhes like tentacles and get more of a jagged ourline.
* Ranma from ''[[RanmaOneHalf Ranma ]]'' has the "simple" extending pigtail form.
** A {{Filler}} manga story has Genma Saotome take a hair-restoring tonic that gives him a ridiculously large, spiky hairdo (a parody of the hairstyles of Super Saiyans from ''DragonBallZ'') when he's angry, which actually attacks the source of his anger.
* Ma Renka in ''KenichiTheMightiestDisciple'' has two short pigtails that droop when she's sad, stand up when she mad, and ''wag'' when she's happy!
* [[http://static.tvtropes.org/pmwiki/pub/images/kerai/1125987253429.jpg Shiho]] in ''Anime/{{Mai-HiME}}'' has four long curls/ponytails which take on a life of their own whenever she gets angry, going so far as to manifest little snake heads at their ends or [[PrehensileHair spontaneously throttle people]] when she's ''particularly'' upset.
* Shiho's counterpart in ''Anime/{{Mai-Otome}}'' wears the same hairstyle but it seems somewhat less [[http://static.tvtropes.org/pmwiki/pub/images/kerai/1142784306250.gif versatile]] (although still expressive).
** Arika's waist-length braids have been everything from an ant's antennae to punctuation marks to a [[http://static.tvtropes.org/pmwiki/pub/images/kerai/1129311451965.jpg heart]], in addition to generally flailing about whenever she gets excited.
* In ''Negima!?'', an AlternateContinuity of ''MahouSenseiNegima'', Asuna's long ponytails are almost as expressive as Arika's braids; in the first episode alone, they stand up when she is agitated, and repeatedly formed the numerals for the number of minutes of extra sleep she wanted. And as if that weren't enough, the bells she wears in them get into the act as well, firing off like cannons when reaches a certain level of frustration. Here, being expressive is the default state of Asuna's hair, forming anything from exclamation marks and question marks to words and CrossPoppingVeins.
* A few characters in ''{{Mahoraba}}'':
** Natsume Kanno's hair occasionally sprouts flowers.
** Chanohata Tamami's braids are known to rise up in anger.
** Momono Megumi's hair antenna can be used to point or form punctuation.
* Hana-chan in ''FruitsBasket'', whose hair was apparently attuned to electrical signals.
* Elizabeth in ''{{Maburaho}}'' on many occasions, as well as one expressive hair battle between Yuuna and Kuriko.
* ''Franchise/SailorMoon'' uses this effect to make Usagi (whose name means "bunny") vaguely resemble a rabbit at comic moments. Not to mention that during [[TransformationSequence transformation sequences]], her odango seem to move on their own in whatever way they want, regardless of the external forces. There's even an early example of her round balls turning into detached ''stars'' for a moment.
* Nearly every Studio Ghibli film ever made, especially Spirited Away.
* Tomari from ''KashimashiGirlMeetsGirl''
* ''Manga/WeddingPeach''
* Parodied in ''Manga/AzumangaDaioh'', Osaka has odd fantasies about the way Chiyo's pigtails work, e.g. when she lifts one, the other goes up too, they enable flight, they ''talk'', and they pop off and can be replaced with new ones.
** Also played straight on occasion.
* Edward Elric's braid (and the rest of his body, for that matter) flares up when ever someone calls him short on ''Manga/FullmetalAlchemist''.
* ''{{Mitsudomoe}}'': Futaba's topknot wriggles during activities that require more than average brain activity (that is, when she's drawing, thinking, making a plan etc.)
* On ''OnePiece'', Mr. 3 of Baroque Works often forms his number-three-shaped top-knot into question marks and exclamation points. For some reason, when he is about to use his Doru Doru powers, the tip sets itself on fire without the flame spreading or him feeling it.
** The flame is here because, y'know, he's a self-proclaimed candle-man.
** And then there is [[{{Cyborg}} Franky]] whose hair works as a fuel gauge and also indicates what kind of fuel he's currently on.
*** Franky can now control his hair by pressing down his nose. Considering how much Oda loves afros and mohawks, it's no surprise that this is currently all it's been used for.
* Tenma from ''SchoolRumble'' has stubby not-quite-antennae sprouting from her temples which waggle when she's happy or angry. This is lampshaded in the comic once: she's feeling decidedly mixed, so one not-quite-antenna is sticking straight out, the other straight ''up''.
* This happens in every single Hayao Miyazaki film -- when she's angry or surprised, the female lead's hair will visibly ''puff up''.
** And in [[PrincessMononoke one movie]], the male lead. He even managed to do it once [[NiceHat with his hat.]]
** The titular character in ''Anime/HowlsMovingCastle'' is prone to this, though it might help that he is a ''Bishounen'' wizard.
* Bakura and Malik in ''Anime/YuGiOh'', as well as Takuma Saiou in ''Anime/YuGiOhGX'', get much more bizarre hairstyles when their evil sides emerge. The same thing happens with Yugi, although in his case the only change that occurs when Yami Yugi appears is that lightning-bolt-shaped strands of hair float up.
* In the unexpectedly violent anime/manga ''Manga/AlienNine,'' the winged hat-like alien symbiotes eventually transform themselves into consciously controllable, spike/spear/drill-forming hair, replacing a host's natural hair.
* Ranka in ''MacrossFrontier'' has startlingly mobile hair, a legacy of her quarter-Zentradi genetics.
* Sasami in the ''PrettySammy'' series has two long tails that often contort and stand on end when she's stressed.
* ''Anime/PrincessTutu'' rarely does this, but there is one comical scene when Fakir is surprised and the bangs covering his face stand straight up in shock. (Oddly enough, his ponytail ''doesn't'' do this.) Ahiru's IdiotHair also seems to have a bit of a mind of its own at times.
* Two notable examples in ''ShamanKing'': Ren's trademark spike of hair raises/gets taller when he gets angry. On the other hand, Ryu's pompadour (whatever state it's in) droops and raises with his mood. The most extreme example was when he realized that Lyserg had gone to another team, and his hair fell out of the pompadour instantly due to grief.
* Himeko of ''PaniPoniDash'' has an expressive [[IdiotHair ahoge]] that not only wiggles when she's happy and stands straight up when she's startled, it also occasionally form shapes like a heart or a question mark, and in the first episode even became a rainbow when she [[OcularGushers cried buckets of tears]].
* ''TokyoMewMew'': Retasu's braids do this on a few occasions, and Ichigo's pigtails also do this somewhat.
* In ''ChronoCrusade'' (manga version) when Satella is first introduced, one of her hair antenna [[http://www.onemanga.com/Chrno_Crusade/15/12/ curves into a question mark]] to show her confusion over something.
* In ''AxisPowersHetalia'', Yonsoo aka Korea's hair has a single strand that curls up. It's often drawn with a little face inside of the curl, so he ''literally'' has expressive hair.
** The Italies' hair curls also do a little of this, occasionally shaping into hearts when happy or going jaggedy in shock.
** There's also been a couple of instances where America's little ahoge will seem to emphasize his emotions as well.
** Austria's ahoge as well, in some instances. Most notably during the Buon San Valentino strip and the Maria Theresa and the War of Austrian Succession strip.
* Mahoro in ''{{Mahoromatic}}'' has two little sideways locks of hair that follow this trope.
* Solty in ''SoltyRei'' has her ears, which look like thick, [[HairColors green]] versions of Mahoro's side locks, do this.
* Noboru Yamaguchi's (for lack of a better word) ''pulsating'' afro whenever he's thinking hard in ''CromartieHighSchool''. Also, just like the Saki example below, Hayashida's mohawk moves around regardless of context... Apart from the scene where he is confused, he scratches his head, and ''his hair scratches his hand''.
* Maka from ''SoulEater'' has pigtails that have a life of their own when she's agitated. (At least in the anime.)
* Ogiue from ''{{Genshiken}}'' has a spiky pigtail that sometimes stands up when she's startled.
* Suzuna from ''{{Eyeshield 21}}'' has an antenna-like bit of hair in the front that zeros in on anyone talking about their romantic relationships (usually denying one). Also, sports commentator "Machine Gun" Sanada has [[AnimeHair sawblade-like protrusions of hair]] that start rotating when he gets fired up (moreso than usual, anyway).
* Kicker's hair in ''TransformersEnergon'' goes white and ruffles whenever he predicts something.
* [[TheOjou Touka's]] IdiotHair in ''Manga/{{Saki}}''. It spins! It stiffens! It points every which way! It's like it has a life of its own!
* Example regarding a hair piece: Tsukasa from ''Anime/LuckyStar'''s hair ribbon often straightens or goes limp and sagging, depending on her mood.
* Misao's braid in ''RurouniKenshin'' often acts like a cat's tail: from stiffening (or [[http://l-userpic.livejournal.com/89903855/20244212 getting a kink]]) when she's angry to curving up when she's surprised.
** Chou, he of perpetually vertical AnimeHair, once claimed that he was so mad his hair stood on end. Kenshin snarked right back that Chou's hair is always like a broom.
* Then there's Nono's hair, in ''DieBuster''. It was part cute, part CrowningMomentOfAwesome [[spoiler: watching her conducting her newly-acquired drones using flicks of her hair.]]
* In ''LightNovel/{{Bakemonogatari}}'', Koyomi Araragi's hair this way and also serves on occasion to point out that SomethingElseAlsoRises.
** At times it also forms a question mark, and at one point in ''Nisemonogatari'', it morphs into a ''kanji''.
* [[SayonaraZetsubouSensei Ai Kaga]] has a ponytail that wags like a nervous dog's tail whenever she apologizes. [[ApologizesALot Which is all the friggin' time.]]
* Sernia Iori Flameheart of ''LadiesVersusButlers!'' presents us a particularly bizarre version of this trope: Her [[AnimeHair coiffure]] is already as ridiculous as it gets, with her [[MegaTwintails curly pigtails]] which resemble [[http://media.animevice.com/uploads/0/270/170524-hair7_super.jpg two gigantic drills]]. If Sernia gets upset, those drills actually start ''[[EverythingsBetterWithSpinning spinning]]'' (complete with appropriate sound effects)!
* On ''KeroroGunsou'', Momoka's Fawcett curls become [[SpikesOfVillainy sharp and pointy]] when her SplitPersonality takes over.
* In the [[ToAruMajutsuNoIndex Railgun manga]] [[http://www.mangafox.com/manga/to_aru_kagaku_no_rail_gun/v02/c008/27.html one page]] Mikoto's hair stands up waves around like an antenna points towards Touma, who is completely behind her at this point walking a different direction, and she runs after him. She has Touma seeking radar hair.
** Her [[AmazinglyEmbarrassingParents mom]] suddenly develops an antenna when she senses an opportunity to make fun of [[{{Tsundere}} Mikoto]] regarding [[SheIsNotMyGirlfriend "him"]].
* In ''Manga/DeathNote'', Light is noted for his ridiculously neat hair -- except at the very end, when it flies around like crazy [[spoiler:after he's finally exposed]].
** In fact, ''any'' time he has a major freakout, his hair goes wild -- such as right at the start, and after L introduces himself.
* ''Manga/ShugoChara'' has [[IdolSinger Hoshina]] [[http://static.tvtropes.org/pmwiki/pub/images/Tropes_Utau_Tadase_7915.jpg Utau]] and her [[CrossPoppingVeins Expressive]] [[GirlishPigtails Pigtails]].
* In ''Manga/AoiHana'', Akira's braids jump up whenever she is startled. Which happens quite a bit.
* The titular character of ''Manga/ShinryakuIkaMusume'' has this in spades. Justified because she's a squid girl and the hair isn't hair, but ten very long, very fast, very powerful tentacles.
* ''Manga/{{Yotsubato}}'': Yotsuba's quadruple pigtails point downwards when she's sad and become rigid when she's exhilarated or shocked.
* Although not used as extensively as many of the examples here, in IGPXImmortalGrandPrix major emotional shifts will cause Takeshi's hair curl to either point up for happiness or fall down for depression, complete with a corresponding slide whistle.
* May from ''Anime/{{Pokemon}}'' did this [[http://imageshack.us/a/img17/8356/m6f9.png a]] [[http://imageshack.us/a/img404/5557/1wk.png couple]] [[http://imageshack.us/a/img823/8015/oowc.png times]] during her first appearance in the anime.
* ''WanderingSon'', the manga version, is made of this trope. All the characters hair is expressive, and changes depending on their reaction or the general scene. Sometimes its just messy because it is, and other times they're shocked or surprised and it stands up.
* ''LightNovel/HaiyoreNyarkoSan'' has Nyarko's overly long and expressive ahoge. Actually being an [[TabletopGame/CallOfCthulhu outer god]], that is technically a tentacle, but that doesn't stop it from being VERY expressive.
* Lucy in ''Manga/ServantXService'' has an IdiotHair that has the interesting ability to change form depending on her current feelings. A pretty exaggerated example occurs in episode 11, when Saya saw Lucy [[{{Bookworm}} in the bookstore]] but there was a bookshelf between the two, so all that is visible to Saya was the said idiot hair. Saya then started watching that idiot hair when Lucy looks for a book and predicted what happened accordingly--from looking for it(Side to side bobbing), to finding it(It literally wags), and at last to disappointment when it costs too much(It droops down). When she actually get to talk to Lucy, those predictions came to be ''completely correct''.
* Haruka and Yuzu from ''Manga/SakuraTrick'' both have bits of their hair that react to their emotions.
[[/folder]]

[[folder:Comic Books]]
* In the Israeli comic ''Zbeng!'', the female lead's hair colour changes based on her emotional state -- black when in mourning, red when angry, etc.
* Franco-Belgian comics example: ''[[http://en.wikipedia.org/wiki/Titeuf Titeuf]]''.
[[/folder]]

[[folder:Film]]
* In ''InterviewWithTheVampire'', Claudia's hair becomes curled and doll-like when she is turned into a vampire. Thereafter, whenever she tries to trim it, it grows back the same way.
* Moe Howard of the ''Film/TheThreeStooges''. Whenever he gets scared, his sugar-bowl haircut would fly up [[RuleOfFunny in a hilarious manner]] [[spoiler:thanks to a blast of compressed air from a hidden tube]].
** UrExample? ''If A Body Meets A Body''.
* A sort-of example in StarWars: Twi'leks don't have hair but rather 'head tails' where hair would be. They use those to communicate things only other members of their species can understand.
[[/folder]]

[[folder:Literature]]
* In ''ATaleOfTwoCities'', of all things. For most of the story, Jerry Cruncher's hair is simple described as very spiky, but in chapter thirty eight, while Jerry is being lied to, there is a "sudden extraordinary rising and stiffening of all the risen and stiff hair on Mr. Cruncher's head." As if to hammer the point home, Dickens relayed this to the reader by having another character ''notice the shadow of the hair moving on the wall.''
* Western Example: ''Literature/PippiLongstocking''.
* Sumi in ''{{Moetan}}'' (pictured above) has various symbols appear at the end of her [[IdiotHair ahoge]], including exclamation marks and CrossPoppingVeins.
* Susan Sto Helit in the ''Literature/{{Discworld}}'' novels has hair that restyles itself to fit the situation. It's assumed this is one of the powers she inherited from [[TheGrimReaper her grandfather]], although it's obviously not one he uses himself.
* Speaking of unfair unlives, it becomes a plot point that whenever Claudia in ''InterviewWithTheVampire'' tries to cut her hair, it grows back to the way it was, curled and doll-like, reminding her of her status as [[ReallySevenHundredYearsOld an eternal child]]. Interestingly, the movie shows her hair actually curling itself about her face as she gets vampirized.
* In ''{{Warbreaker}}'', one nation's royalty is able to change their hair color and length. Unless they are otherwise suppressing it, the color changes according to their emotions at the time.
* Tonks from the ''Literature/HarryPotter'' series is a Metamorphagus, which means she can change her hair (and other features) at will. Her standard hair color is pink, but it changes to several colors, such as purple and mousy brown throughout the series.
** This trait is also passed to her son Teddy.
* In Creator/IsaacAsimov's short story [[Literature/IRobot "Escape!"]], Mike Donovan's perpetually MessyHair "bristle[s] into separate wires" in his agitation.
* In ''LuckyStarr and the Big Sun of Mercury'', Bigman Jones's pale red hair "[stands] on end with passion".
* In Literature/ThePlaneteers book "The Brain Stealers of Mars", Rod Blake's hair "[rises] very slightly from his head" when he finds out about the ''[[{{Shapeshifting}} thushol]]'''s tendency to KillAndReplace the other Martians.
* Fully adult female Clan in ''Literature/TheClanChronicles'' have hair with a mind of its own that twitches and curls roughly in tune with their emotions.
[[/folder]]

[[folder:Live Action Television]]
* In ''Series/DoctorWho'', the Tenth Doctor has hair that sticks up a bit more whenever he's excited about something, because he shoves his hands through it if things get interesting. It's not very noticeable, but it's deliberate.
* The short-lived live action version of TheTick carried over the Tick's expressive antennae from the cartoon using remote control servos in his costume.
[[/folder]]

[[folder:Theatre]]
* OlderThanSteam, apparently, if these lines from Theatre/{{Macbeth}} are anything to go by:
--> '''Macbeth:''' If good, why do I yield to that suggestion
--->Whose horrid image doth unfix my hair
--->And make my seated heart knock at my ribs
--->Against the use of nature?
[[/folder]]

[[folder:Newspaper Comics]]
* In ''ComicStrip/{{Dilbert}}'', this is a qualification for becoming an engineer.
* In ''ComicStrip/{{Zits}}'', Jeremy has a great poker face but terrible 'poker hair'.
* In ''ComicStrip/{{Peanuts}}'', Linus' hair stands on end when he's startled.
[[/folder]]

[[folder:Video Games]]
* Daryan Crescend from ''VisualNovel/ApolloJusticeAceAttorney''. He has a massive phallic-shaped hairdo. [[spoiler:It flops around, droops when you catch him lying on the witness stand and becomes rigid when he's in a good mood.]]
** It's supposed to be reminiscent of a shark, like everything else about him. Unfortunately, the entire fandom's mind is in the gutter, so...
** ''Trials & Tribulations'' has Ron [=DeLite=], whose cinnamon-bun curls of hair on the sides of his head uncurl and spring out when he's upset. This trope is actually pretty common across a lot of animations in the series, especially when the character is nervous.
** ''T&T'' also introduces us, in a flashback case, Winston Payne's pompadour which droops whenever he's nervous. [[spoiler:When Mia corners him into a state of shock, ''[[HairTodayGoneTomorrow it rapidly disintegrates]]'', explaining his present hair loss]].
** Pearl's pretzel-hair mysteriously bounces when she's shocked, or grinning manically/happily. Also, when she's sad, her hair droops backward while she tilts forward.
** Hell, Phoenix and Apollo themselves. Their hair looks quite downcast when they're losing, and returns triumphant come victory time.
** ''Ace Attorney Investigations 2'' introduces us Yumihiko Ichiyanagi's question mark-shaped IdiotHair that turns into an exclamation mark whenever he's surprised.
* Laharl from ''VideoGame/DisgaeaHourOfDarkness'' has two hair "antennae" on his head that have the tendency to go stiff (or straight up) when he's particularly angry or annoyed.
* VideoGame/TrinityUniverse: Lucius's IdiotHair. It's a tension gauge according to him, but it still expresses emotions. Flonne has a field day asking him if it shoots lasers.
* Nikki's IdiotHair from ''ManaKhemiaAlchemistsOfAlrevis'' can get as ''angry'' as she is, which is often...
* {{Vocaloid}}: Some fan depictions of Miki make her ahoge change shape according to her emotions.
* ''VideoGame/ChronoTrigger'': Kino's ponytail droops in his sad sprite. And it is absolutely [[{{Moe}} ADORABLE]].
** Marle's ponytail turns into a fro when she's startled.
* GenkiGirl Momoko from ''{{Aoishiro}}'' has short braids that stick up and go spiky when she is surprised or excited and droop when she's feeling down (not that that state of affairs ever lasts long).
* [[HistoricalDomainCharacter Toyosatomimi no Miko]] of VideoGame/{{Touhou}} is occasionally portrayed as having this in fanon with her [[BuffySpeak hair...flappies]].
** Her hair's supposed to look like [[ExpressiveEars cat/dog ears]], since [[{{Pun}} "satomimi" can also mean "animal ears"]].
* Kai's hair in ''VideoGame/PokemonConquest'' is very expressive. When she gets angry, it practically explodes.
[[/folder]]

[[folder:Web Animation]]
* Mr. Milk from ''MakingFiends'' is almost completely bald, but has a few hairs on his head that stick up when he's scared or nervous. Charlotte seems to have an expressive ''bow''.
* Snake in ''Franchise/MetalGear [[AwesomeSeries Awesome]]'' does this a lot with his eyebrows. They become thicker, bushier and/or longer the more pissed off he gets. At one point, they grow to the point they resemble tree branches, complete with oranges sprouting out of them.
[[/folder]]

[[folder:Webcomics]]
* Multiple characters from ''Webcomic/{{Monsterful}}'', Lawrence Spectrum flame hair is very expressive and often shows emoticons related to his emotions, including [[http://www.monsterful.com/chapter08page10.php exciment]] or [[http://www.monsterful.com/chapter14page24.php disappointment]].
** Samantha Thing also uses her hair to enhance multiple [[http://www.monsterful.com/chapter16page02.php expressions like doubt]].
** Sapphire Gem hair shows this in a lesser degree.
* Susan of ''Webcomic/ElGoonishShive'': Dan says "Badass Hair in the Wind Effect With No Wind is your friend."
** Not to mention Grace. [[JustifiedTrope Justified]] in that she actually has antennae from her uryuom blood.
* The sorceress Suspiria in ''Webcomic/{{Flipside}}'' has her hair enchanted to reflect her emotions. It also becomes large and billowy when she does magic.
* ''Webcomic/{{Freefall}}'''s Sam and Helix have expressive ''radio antennae''.
* In ''Webcomic/TheKAMics'' Gertrude's pigtails & Nikki's ponytail sometimes do this.
* Yuki from ''Webcomic/{{Megatokyo}}'', thanks to [[MagicalGirl magic]].
* ''Webcomic/{{Misfile}}'s'' Missi has had her pigtails stick out a couple times.
* The author of ''Webcomic/OtherPeoplesBusiness'' has joked that Mercedes' hair is sentient, and attempts to restrain it will only incur its wrath.
* In ''Webcomic/SequentialArt'', Pip's strand/feather perks or droops depending on his mood.
* Many fans consider this to be one of the most endearing things about {{Shadowgirls}}' resident BadassNormal Lindsey Jun Yeoh.
* The girls of ''Webcomic/WapsiSquare'' have hair that behaves according to their moods. If happy, their hair is perky. It droops if they're sad, and it gets spiky and pointy if they're angry.
* (Fallapart)Fernando the zombie from ''Webcomic/UnlifeIsUnfair'' has some rather expressive [[http://www.drunkduck.com/Unlife_is_Unfair/index.php?p=353198 antenna hair]].
* ''Webcomic/{{Blip}}'': On [[http://www.blipcomic.com/721/ this page]], Angela [[LampshadeHanging wonders how K's hair does that]]; which is funny since Angela's hair can be [[http://www.blipcomic.com/722/ just]] as [[http://www.blipcomic.com/724/ expressive]].
* Used, and then lampshaded, in ''Webcomic/QuestionableContent'' [[http://questionablecontent.net/view.php?comic=2066 here.]]
* In ''Webcomic/{{Rhapsodies}}'' Paul's mullet fluffs up whenever he's excited or angry.
[[/folder]]

[[folder:Web Original]]
* While never seen in action, the author of the web fiction serial ''Literature/DimensionHeroes'' has stated that the tufts of hair on Tami's head change depending on her emotions; when she's sad, they droop. When she's scared, they stick straight up. When she's furiously angry, they frizz out like a cat.
* In ''GaiaOnline''[='=]s Valentine's Day '09 NPC Valentines, Blaze's gigantic ponytail is formed heart shapes.
* A rare, real-life example: [[Creator/JohnGreen John]] of the WebVideo/VlogBrothers has a nervous habit of running his hands through his hair when anxious, which causes it to get puffy.
* Slipknot, a member of the superheroic Euroguard from the ''GlobalGuardiansPBEMUniverse'', has long, [[SuperStrength superhumanly strong]] hair he can use as a set of hands. Naturally, it also reflects his emotional state.
[[/folder]]

[[folder:Western Animation]]
* The animated version of ''WesternAnimation/HowTheGrinchStoleChristmas''.
* Harley Quinn from ''WesternAnimation/BatmanTheAnimatedSeries'' has blond pigtails when she's not in costume that perk up or droop, depending on her moods.
** They still do it ''in'' costume; they're just stuffed in her hat and take it with them.
* Sari Sumdac in ''WesternAnimation/TransformersAnimated'' has the "sticking up pigtails" version, though it a couple occasions they friz up like a scared cat's tail.
** Somewhat justified. [[spoiler:She is a robot and the hair may just as well be metallic.]]
* Each hair on [[Franchise/ScoobyDoo Shaggy's]] head has a tendency to [[http://3.bp.blogspot.com/-JrJbjptBkG4/UNWjBvVwBJI/AAAAAAAAIxQ/n-5cTOL6DlQ/s1600/scooby_doo_3.jpg stick out every which way when he's frightened]].
* Parodied on ''WesternAnimation/TheSimpsons''. When Music/WillieNelson successfully reunites the family, his trademark braids rise like those of Literature/PippiLongstocking.
** Krusty the Clown on ''The Simpsons'' has expressive hair, especially in the season 4 episode "Lisa's First Word". During a Krusty Burger commercial for the 1984 Olympics, Krusty bites into a Krusty Burger. When the commercial ends and the director yells, "Cut!", Krusty spits out the burger and his hair droops (then slightly comes back up after he drinks some booze from a flask to wash the taste out of his mouth).
* In some early episodes of ''WesternAnimation/KaBlam'', June's ponytail seemed to stick up when she was scared or shocked, and drooped when she was sad or tired. This was dropped after a few episodes, however.
** Loopy's pigtails seem to rise a bit when she's scared, curious or inspired.
** Also in the episode "Comics of Champions", when June keeps on teasing Henry about his crush on Thundergirl, he gets so upset that his hair goes on fire, but June puts it out (wearing a firefighter hat with a siren in the background).
* WesternAnimation/TheTick's antennae react in a similar fashion.
* Pinkie Pie's hair in ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', which is apparently made curly by sheer exuberance; when she's bummed out (as seen in "Cutie Mark Chronicles", "Party of One", and "Magical Mystery Cure"), it becomes straight. It can't even be styled when she's happy or excited - it is permanently a curly mess.
* In at least two episodes of Hanna-Barbera's version of ''WesternAnimation/TheLittleRascals'', when Darla is frightened, her hair resembles a brown sea urchin.
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[[folder:Real Life]]
* This is actually TruthInTelevision, as humans still retain tiny muscles in the hair follicles that are used to puff the hair in most warmblooded animals, and this is the same reaction that give us goosebumps. Said muscles are much too weak to control long and heavy hair, but if a person has, say, a crewcut, it can visibly swell when that person is angry, afraid or simply cold.
** This is also why cats ''ripple'' and dogs raise their hackles when they're alarmed.
** Part of this is a vestigial defense mechanism from when humans were much hairier animals. By making all the hair follicles on our body stand on end when we're afraid, we look larger to predators and have a chance of scaring them off.
* Some birds (like cockatoos and bluejays) have expressive ''feathers'' on their heads (crests).
** Most birds, in fact, will fluff up for various reasons (happy, frightened, cold, etc.), sometimes resulting in what looks like little more than a feathery fluffball with legs.
** Consequently, paleontologists think that some dinosaurs may have done this, too.
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