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* Midway through the episode ''WebVideo/BrowsHeldHigh'' reviewing ''Film/VaseDeNoces'', Kyle gleefully squees over the baby piglets before things take a dark turn.
-->'''Kyle''': Awwww! They die. (''Beat'') They die because [the protagonist] kills them. (''Beat'') He ''hangs'' them. In little pig-sized nooses, in a row like convicts.
* Creator/DerrickComedy takes this to extreme levels in its Keyboard Kid sketch. Jeffrey the 6th grader is performing with his "amazing keyboard" at the 6th grade talent show. He starts out cheerfully dancing to the beats and vocal samples of his sampler keyboard...
--> My name is Jeffrey! Cool! Alright! C-c-cool! Alright! Get down! Check it out! Cool! Alright! C-c-cool! Alright! G-g-g-get down! Kick it! '''If I mess up my dad's gonna beat me!''' ''silence''
* Waverly Films does this in "Wanna buy a ghost?". The mood changes from serious and concealed to a common reaction.
** Shady Guy: Hey. WANNA BUY A GHOST?
** Tourist: A GHOST?
** Shady Guy: SHHH. KEEP IT DOWN.
** Tourist: How much?
** Shady Guy: 5,000 DOLLARS.
** Tourist: ...Okay!
* [[http://www.explosm.net/comics/1746/ This]] ''Cyanide&Happiness'' short does this over the course of 30 Seconds
*** [[http://www.explosm.net/comics/1944/ This]] one as well. And then it lashes back.
* The "Child Molester" clip from ''[[AMVHell AMV Hell 4]]''. It's an hour of silly jokes and you've long come to expect BlackComedy, but this comes completely out of the left field. There's no joke in it. It's just there, making you feel terribly akward. [[YouBastard Possibly intentional]].
* [[WebVideo/DoctorHorriblesSingAlongBlog Doctor. ]]'''[[WebVideo/DoctorHorriblesSingAlongBlog Flipping. ]]''[[WebVideo/DoctorHorriblesSingAlongBlog Horrible.]]''''' Not only does the tone do a complete 180 from lighthearted comedy to straight-up tragedy in the space of 45 minutes, during the most heartbreaking moment of the entire series, [[spoiler:the ReallyDeadMontage shortly after Penny dies, one of the newspaper headlines which flash across the screen says, "COMMUNITY MOURNS DEATH OF WHAT'S-HER-NAME". And this is during ''a dramatic scene.'']]
** In that same [[spoiler:ReallyDeadMontage, we have "CAPTAIN HAMMER DEFEATED: Hero 'Unavailable for Comment' For First Time Ever."]]
** And the last two seconds of the entire thing go with an instant cut, within a song, from [[spoiler:triumphant Dr. Horrible entering the ELE boardroom to absolutely emotionally '''destroyed''' Billy]]
** Not that the earlier parts of the series are immune to this: the Act II song "My Eyes" features Dr. Horrible spying on Penny and Captain Hammer's dates via some extremely transparent disguises (including one use of MobileShrubbery). Pretty funny...and then you [[LyricalDissonance hear what he's singing]]:
----> Anyone with half a brain\\
Could spend their whole life howling in pain\\
Cause the dark is everywhere\\
And Penny doesn't seem to care\\
That [[{{Foreshadowing}} soon the dark in me is all that will remain...]]
** Right before the beginning of the end, though, we get a taste of what Doc will become: Captain Hammer is singing [[{{Jerkass}} a great big number about how everyone (but mostly him) is a hero]], only to be cut off right before the big ending note by the Freeze Ray, and Doctor Horrible lets out a ''terrifying'' [[BrickJoke evil]] [[EvilLaugh laugh]]. And that's ''before'' he starts to sing Slipping- and it is '''scary''':
----> Look at these people\\
Amazing how sheep'll\\
Show up for the '''slaughter'''...\\
No-one condemning\\
You lined up like lemmings\\
You led to the water...\\

** JossWhedon: your one-stop shop for MoodWhiplash.
* ''{{Survival of the Fittest}}'', being an RP board, can have this happen with someone barging in during a dramatic moment.
** There's also the character of Milo Taylor. For most of his life (lasting up to the exact halfway point of the game), he was basically RefugeInAudacity personified with a dash of CrazyAwesome for flavor. [[spoiler: Then he got thousands of volts sent through his body and his collar exploded, rendering him unable to even scream because his trachea was torn apart. Then he bled to death very quickly afterwards.]]
* ''ThereSheIs!'' from http://www.sambakza.net/. The first three episodes are pretty light-hearted, but the fourth episode, "Step 4 - Paradise" takes on a darker mood. This shift was likely alluded to at the end of "Step 3 - Doki and Nabi" when [[spoiler: a rock gets thrown through Nabi's window]].
** Specifically, in the fourth episode, [[spoiler: Doki and Nabi are subjected to constant persecution because of their, erm, mixed dating.]] Doki gets [[spoiler: injured by an angry mob, and one of her pets is actually ''killed'', though it was probably an accident]].
** Then, in this series' second instance of mood whiplash, the fifth and final episode goes back to being cheerful and action-oriented, but is still more serious in tone than the first three. Incidentally, if you've seen the whole series, then the street-punk rabbit [[spoiler:handing Nabi the plane ticket]] probably qualifies for a CrowningMomentOfHeartwarming.
* The D&D PHB PSA series on Youtube does this, interspersing the comedic interviews with D&D characters with the lonelymal69 subseries, where VillainProtagonist Malcanthet the Succubus Queen attempts to avoid being executed by [[ChurchMilitant Order of Saint Cuthbert]]. And the lonelymal series itself does this, mixing scenes of drama with ones where the demon lord of the air Pazuzu attempts to prove to Mal that chickens are the deadliest creatures on Earth
* Happens in Alexander Leon's [[http://www.alxlen.com/mariobrothers.html Mario Brothers]], especially the last one, where [[spoiler:Mario effectively kills himself by letting a flowing pool of lava burn him to death, after nearly everyone else and their mothers were already dead...]] and then cut to the happy underwater level music for the credits.
* ''FanFic/TiberiumWars''. Annual [[ChurchMilitant Black Hand]] Taco Fiesta.
* Monstro_draw brings us "[[http://monstro-draw.livejournal.com/9779.html Cat Rackham and the Comforts of Life]]", a lighthearted, [=NSF56K=] story about a cat who wants some coffee and AHH! AHHHH!
* ''AVeryPotterMusical'' is mostly a light-hearted parody of Literature/HarryPotter but there is the occasional moment where-based on it following the series's plot of all things-you will get serious whiplash.
* In WebVideo/HumanCentipedeTheMusical, Heiter interrupts Steve’s cheerful music number by drugging him and dragging him offstage.
* ''[[ColourMySeries Colour My Dreams]]'' starts you off in a bright, sunny area with stuff to do. Then you pick up the phone and...things change.
* ''[[http://www.youtube.com/watch?v=jI4Ojgz5Qo4 Mr. Literal]]'' by Egoraptor. Whips so hard you'd risk breaking your neck.
* [[LoadingReadyRun Desert Bus for Hope 2010]] saw a very sad story told about a young girl being treated for cancer. The whole cast was beside themselves with emotion and sorrow. Then, in the silence...
--> ''Graham'': So, who wants to sing [[Theatre/AvenueQ The Internet is for Porn]]?
* ThisVeryWiki in general. The pages here vary from lighthearted and silly to [[Sandbox/DepressingTropes dark and depressing]]. It's easy to click a potholed link, and end up on a page where the tone is the complete opposite from the one you were previously at.
** The DarthWiki/SoBadItsHorrible page. At one moment, you'll be giggling at the snarky descriptions of [[SnarkBait hilariously bad]] attempts at entertainment or truly pathetic fanfiction, and at the next moment reading about the dangers of hazardous toys and rides, and the harm those things have induced on innocent kids.
** The RealLife section of JustBugsMe: ranging from an ardent discussions of cultural perceptions to vehement attacks against political beliefs to injokes to a discussion about how awesome boobs are.
* This picture: [[http://i.imgur.com/Fk7k1.jpg]]
* A good number of screamers are like this. One moment, you're looking at peaceful, beautiful scenery as calm music plays, the next...'''''[[JumpScare RAAAAAAAAAAAAAAAAAAAAAAHHH!!!]]'''''
* NitroGameInjection is usually a fun, lighthearted video game music podcast, but during a segment of the eight anniversary episode, that was put on hold as former show co-host Akumu returned to pay tribute to Fumapero, a {{doujin}} music arranger who had been missing and displaced after the devastating earthquake in Sendai, Japan. Luckily, she announced a few days later that she was okay and had returned home.
** Happened again when Akumu, who was a close friend of recently deceased (as of 2011) game composer RyuUmemoto, was brought back to discuss Umemoto-san's life and career as a tribute to him.
* ''[[http://www.youtube.com/watch?v=KkCqm8VyFg4&feature=feedu You're Entering Puberty Charlie Brown]]'' starts off as a funny {{LampshadeHanging|lampshade}} on the Peanuts universe then goes into TearJerker mode [[spoiler:with snoopy dying all alone]].
* Entry #46 of ''MarbleHornets'' contains a) two of the [[BlackComedy funniest]] lines in the series and b) the most effective JumpScare yet.
* Brought up in cautionary fashion at the opening to Chapter 4 of the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic [[http://www.fimfiction.net/story/1451/The-Monster-Mash The Monster Mash]]; given that Chapter 3 has [[LeeroyJenkins Rainbow Dash]] end up as a {{Kaiju}} and chapter 4 is about [[GenkiGirl Pinkie Pie's]] ghost interacting with her grieving friends, it's hard to call it unjustified.
-->''Author's Note: each chapter of the Monster Mash has its own tone, and while none of them are truly grim, some are darker than others. If you're reading this chapter right after 'The Big Battle', consider yourself warned.''
* [[http://www.youtube.com/watch?v=6QFwo57WKwg DYE's Fantasy]] is ''great'' on this trope. The beginning is so innocent...Oh, just a bunch of teenagers doing some mischief at a school swimming pool at night and discovering love and fighting their insecurities and..WAIT, WTF IS THIS!!?!? [[spoiler: Couple making out at the pool become a pair of disgusting alien-zombie like things. Boy hitting on the shy girl gets killed with the most ''painful'' oral sex ever thought. Shy girl desperately tries to escape, while the previous boy's dying body merges with the monster girl, and ''keeps squirming like an insect at her mouth''. Shy girls avoid the same fate by the monster boy by jumping on the pool, which, by the way, is a door to another dimension. There, her mind is fried and she ''burns from the inside'' upon seeing a gargantuan Cthulhu-like beast who is probably the cause of all this. Video ends.]] and it all started like an ordinary High School story...
* The third year of ''TheQuestportChronicles'' begins with the heroes still celebrating last year's victory over the BigBad. And then, out of nowhere, [[spoiler:a sorcerer [[WhamEpisode destroys Questport]]. The story picks up again with the [[TheRemnant few survivors]] searching for a new home]].
* [[http://www.youtube.com/watch?v=9C_HReR_McQ Don't Hug me I'm Scared]] seems to start off as an AffectionateParody of various puppet shows. Then the puppets finally start thinking "creatively"....
* [[http://www.youtube.com/watch?v=xOPhNMl-4TQ This video]] takes the original DownerEnding of ''VideoGame/Left4Dead'''s "The Sacrifice" campaign and, in the last seconds, makes it hilarious.
* The {{WebVideo/BriTANick}} video, [[http://www.youtube.com/watch?v=3OQWjsqW6Ts "The Kiss"]], is a rather extreme case of this trope. [[spoiler:It goes from a good, wholesome silent film style romp to an incredibly dark and twisted take on A Clockwork Orange]] -- All in a spine-shatteringly quick 5 seconds.
* ChannelAwesome contributor [[TheSpoonyExperiment Spoony]] has a video series known as 'Counter Monkey,' involving tales from various roleplaying game situations he has experienced. In an upload concerning the ''ThievesWorld'' game setting ([[http://spoonyexperiment.com/2012/03/04/counter-monkey-thieves-world-part-2-the-chicago-way/ part two]], currently titled [[Film/TheUntouchables "The Chicago Way"]]), his discussion of the game's events involve the immortal and severely upset Tempus Thales going over the MoralEventHorizon in a severely [[{{Squick}} Squicktastic]] fashion... and right in the middle of that topic, Spoony suddenly comments on [[PreciousPuppies his dog Oreo]] having a dream on the bed and how cute she looks when she's confused.
* Dei-Sama's ''[[http://www.newgrounds.com/portal/view/461635 Shinukoto!]]'' starts out as a cute and comedic anime short about a girl trying and hilariously failing to off herself with various means, including trying to shoot herself, throwing a toaster into the tub, trying to hang herself, trying to drown herself, and finally sticking her head into an oven. [[spoiler:It ends with a heartbreaking hospital scene, with sad piano playing and a card from some kid saying "please return," as the girl closes her eyes and the heart monitor flatlines]].
* ''WebVideo/PoniesTheAnthology'' has things such as a creepy montage using the ''AreYouAfraidOfTheDark'' theme to Pinkie Pie laughing like WoodyWoodpecker.
* ''WebVideo/AtopTheFourthWall'' has one rather jarring WholeEpisodeFlashback, wherein the first 9/10 of it have nothing to do with the framing story, being a humorous standard lighthearted internet review of a wholesome, innocent Archie christmas issue. When the person telling the story is finally asked where ''he'' was during all this, we find out his son had died, his wife left him, and he'd spent the past half year standing outside the cemetary and doing little else, and shortly after the review we saw Linkara had found him lying in a gutter and helped him get back on his feet and get his life back together.
** Also happens in "The Next 15 Screw-Ups", less intentionally. Linkara, in a quiet and regretful voice, apologises for being insensitive about depression in a previous review. Except the various items in screw-ups videos are separated by a specific comedy song running over WesternAnimation/RenAndStimpy clips.
-->'''Linkara''': I sincerely apologise.\\
'''Music/WeirdAlYankovic''': ''Eeeeeverything you know is wrong...''
** AT4W in general has this ''very'' heavily, since the (often very dark) plot segments happen at the beginnings and ends of humorous comic book reviews. So, during any arc involving a serious villain, you'll have episodes going straight from a CrowningMomentOfFunny to SanitySlippage, murder, and fights with [[EldritchAbomination eldritch abominations]]. For example, one episode goes from a review of a Vanilla Ice biography to [[spoiler: Holokara phasing his hand into 90s kid's chest and threatening to [[AxeCrazy crush his heart]] if he [[DisproportionateRetribution ever interrupts the review again]], while being [[DissonantSerenity frighteningly calm]] the whole time.]]
* ''WebVideo/TheLizzieBennetDiaries'': all videos of Lydia's spinoff vlog end with an upbeat "duh nuh nuh nuh nuh nuh, nuh nuh nuh nuh nuh nuh YEAH!" by her. This becomes more and more jarring as CerebusSyndrome sets in with the plotline revolving around George Wickham emotionally abusing and manipulating Lydia.
** In the original videos, Lizzie and Fitz were making an adorable care package for Jane when [[spoiler: Fitz unknowingly revealed that it was Darcy who broke up Jane and Bing.]]
** In Episode 84, Lizzie was gleefully showing off her new phone and Darcy was on the verge of asking her out on a date when [[spoiler: Lizzie learns from Charlotte that Wickham intended to publish a sex tape featuring himself and Lydia.]]
* "To This Day" starts with a humorous anecdote about pork chops, but suddenly takes a left turn as it veers into highly depressing subject matter.
* "Blue Patches" from WebVideo/DemoReel. At first it starts off fairly easy with Rebecca and Tacoma finding out that Donnie's DarkSecret was that he was a ridiculously bad child actor, and Donnie being "looked after" by a kooky family. You start to relax, thinking the depressing "Lost In Translation" and "The Blair Witch Hangover" were just leading up to a comedic reveal... but then everyone finds out that [[spoiler: Donnie's mom committed suicide when he was young]].
** Not only that, but the "kooky" family turn out to be [[NotSoHarmlessVillain Not So Harmless Villains]].
* [[http://www.youtube.com/watch?v=oVfUJkYqMOU Nyan Caxx]]. [[spoiler: Twice.]]
* [[http://www.youtube.com/watch?v=K5bqtqe2F-E One Girl, One Sandwich]]. It starts off with a pleasant atmosphere: a girl wakes up, craving a sandwich. She gets bathed and dressed before hopping in her car and driving to a [[BlandNameProduct WubWay]]. She orders a sandwich, sits down to eat it...[[spoiler: and then the sandwich comes to life and bites her head off before attacking the camera.]]
* ''UltraFastPony'' plays this for laughs. The theme music is a brief clip from ''WesternAnimation/MyLittlePonyFriendshipIsMagic'''s opening music. The series likes to play the theme after a ColdOpen involving the characters being the opposite of friendly.
-->'''Twilight:''' Rainbow Dash, apologize!\\
'''Rainbow Dash:''' No!\\
'''Twilight:''' Dammit!\\
'''Theme music:''' ''Frieeeeeeeeeeeeeeeeends!''
* ''FanFic/FalloutEquestriaProjectHorizons'' is normally very dark and depressing, which makes the occasional lighter moment really stand out. The mood can swing from civilians being massacred by [[KnightTemplar Steel Rangers]] to a ponified version of [[Anime/FullmetalAlchemist Alex Louis Armstrong]] trying to woo [[RogueDrone Lacunae]].
* ''Literature/{{Worm}}'' has a few such moments, but a particularly vivid (and [[WhamEpisode spoilerish]]) example comes [[http://parahumans.wordpress.com/2013/07/09/scarab-25-4/ here]]: the chapter goes from lighthearted drama ([[spoiler:Weaver making an emergency phone call to Glenn]]) to comedy ([[spoiler:the Chicago Wards -- Weaver's superhero team -- appearing on a stupid morning talk show]]) to horror ([[spoiler:an ''entirely new Endbringer'' -- city-killing abomanation -- attacking]]).
* Season 3 finale of ''Series/{{Noob}}'' has several in a row. [[spoiler:Sparadrap's pets, the thing he cares the most about in the game get killed by enemy players, obviously shattering him. His usually selfish teammate Gaea calls the perpetrators "monsters"... because she was intending to steal said pets and sell them for lots of money (which suits her much better). Other usually selfish teammate Omega Zell reacts along the lines of "You're ''really'' a horrible person, Gaea". Then Sparadrap starts going berserk in radical contrast to his usually foolish attitude. But the enemy players are much stronger than them and quickly get the upper hand back. Then The Cavalry arrives just in the nick of time! Next thing we see is a clamed down Sparadrap, still mourning his pets while his brother cheers him up.]]
* Near the end of ''WebVideo/TheCartoonMan'', a tense, serious scene abruptly gives way to a wacky, slapstick cartoon battle scene. [[spoiler:Then, when a non-cartoonified character is seriously injured, the scene suddenly becomes even more serious than before.]]
* [[InvokedTrope Invoked]] by [[http://youtu.be/fyKxp5e9Lf4?t=2m53s this]] (expletive-filled,[[note]]although censored[[/note]] ranting) entry of JacksFilms' "Your Grammar Sucks" series. [[spoiler: It inexplicably ends with the words "I like that", and Jack reads it accordingly.]]
* Rachel Bloom's comedy music video [[http://www.youtube.com/watch?v=ucmsunDs3jE I Steal Pets]] seems nonsensical and frivolous until the protagonist reveals midway through that [[spoiler:[[MyParentsAreDead both her parents are dead]],]] providing the most likely explanation for her bizarre reaction to getting bullied at school.
* Pointed out in [[http://occupyrichierich.tumblr.com/post/46534545542/ok-this-is-issue-10-of-richie-rich-and-jackie this]] ''Blog/OccupyRichieRich'' post:
--> "ok this is issue 10 of richie rich and jackie jokers and the previous 9 issues had covers that were typical money-based [[VisualPun visual gags]], and then suddenly this motherfucker comes along and not only are richie and jackie going to fucking die but [[UpToEleven so are billions in a forthcoming atomic war???]] jesus fuck that is some tonal whiplash"
* The [[https://twitter.com/coffee_dad Coffee Dad]] twitter is normally very repetitive, [[ExactlyWhatItSaysOnTheTin a dad talking about coffee]]. Then, sometimes, [[spoiler: he'll randomly make a tear-jerking post about missing his deceased son.]]
* Taking a WikiWalk through the files of the Wiki/SCPFoundation can induce Mood Whiplash. One minute you're reading an article about an average guy named Fred who travels through books and inserts himself into them, the next you're reading about a heart-monster with CombatTentacles and a stinger that [[WordSaladHorror babbles nonsensically]] as it kills people, or some eldritch artifact that could cause TheEndOfTheWorldAsWeKnowIt if it fell into the wrong hands. Sometimes a reader can suffer whiplash in the same article: the lists of attempts to kill the Hard-To-Destroy Reptile alternate between horrifying and hilariously bizarre, and [[BlackComedy sometimes dabble in a bit of both]].
* ''Website/SFDebris'': episodes swing between jokes and tragedy, discussing traumatic experiences or heartbreaking events on-screen with jokes about Captain Janeway being a MadScientist; see "Jetrel", for example, where a soliloquy on the horror of war is followed up by describing the result of an onscreen experiment as "this jar full of gas becomes a jar full of snot". Then there's the week-to-week whiplash, with "The Inner Light", which received rave reviews and a discussion of how brilliant and haunting it is...followed by "Twisted", which is compared to watching tarantulas have sex.
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