-->-- Motto of ''NaNoWriMo''

Some authors plan meticulously. Before they even start to write, they have a detailed plot synopsis, character biographies, pages on setting, and a detailed backstory to the main tale... at the least.

Others just sit down at their word processor and type whatever comes into their head. This trope is dedicated to them.

This is not necessarily a trope about authors who simply write without a speck of planning at all (although it can be), but rather those who, overall, are improvising as they write. They may already have invented their characters, perhaps they have a vague plot bubbling in their head, even a few notes on {{backstory}} or setting. What separates this kind of writing from planned writing is that these writers are prepared to throw those notes in the trash the moment they come up with an idea that they prefer. So you're writing a hardboiled crime fiction novel: Remember that takeaway place you thought up on the spot to give your sleuth somewhere to eat his lunch? That would be perfect as a front for the BigBad's drug-dealing business. Making a movie? That actor's take on that character is [[ThrowItIn way better than what you originally had in mind]]. Why not rewrite half his part to take advantage of that vision?

The trope name comes from the phrase "flying by the seat of your pants", a colloquialism for "deciding a course of action as you go along".

Like most things, this can be done well, or badly. TheChrisCarterEffect and KudzuPlot is what happens when Writing by the Seat of Your Pants leaves too many loose plot threads.

This is the novelistic version of SchrodingersGun or the IndyPloy; when the author of a series canonizes ''fan suggestions'' as he goes along, see AscendedFanon. Can also be related to IJustWriteTheThing.

Please only add examples where the author ''admitted'' to doing this. This is not a page for speculation.


[[folder:Anime and Manga]]
* Writer Tsugumi Ohba admitted that this was pretty much the way they[[note]]They keep their identity a secret, which includes their gender[[/note]] wrote ''Manga/DeathNote'': they'd write Light into a massive jam at the end of one chapter, and would then try and figure out how to get him out of it only when time came to write the next one.
* The writers of ''Anime/TengenToppaGurrenLagann'' admitted, regarding the [[GainaxEnding Gainax First Scene]] of the series, that they "lost that plot thread somewhere".
* ''Manga/{{Bleach}}'': Creator/TiteKubo has admitted to using a combination of this and arc planning. However, he is infamous for using this trope ''and'' for his special use of ChandlersLaw: "When suffering writer's block, introduce a new awesome character to overcome it". The trouble is, he doesn't actually introduce a new character, he introduces a new CastHerd instead. LoadsAndLoadsOfCharacters ensue.
* Hidenori Kusaka does this in regards of ''PokemonSpecial'', as he has to write along side of whatever games just come out. What really makes him impressive, however, is that he doesn't work for Game Freak yet the series has a sheer amount of generation-spanning ArcWelding and [[ChekhovsGun Chekhov's Guns]]. Fans joke that he can see into the future.
* Osamu Tezuka wrote ''Ambassador Atom'' (the prototype for ''Manga/AstroBoy'') as he went along. Notably, he had no idea who "Atom" would be, until he later decided to write him as a robot built to replace Tenma's deceased son. He would later ReTool Atom into his current incarnation, and subsequently redid the story as an episode of ''Astro Boy''.
* Creator/RumikoTakahashi admitted not planning and not knowing where her manga was going during the supposedly final battle with Naraku in ''Manga/InuYasha'' or with ''Manga/{{Rinne}}'' in general.
* AkiraToriyama of DragonBall fame has admitted that he made up the story as he went along. The fact that this worked is quite impressive. The Cell Saga is a particularly funny example, [[http://www.kanzenshuu.com/intended-end/cell/ as he originally intended Androids 19 and 20 to be the main villains, created Androids 17 and 18 after his former editor complained that they were lame, and created Cell after the same former editor said they weren't threatening enough]].
* Much like its initial influence FistOfTheNorthStar, Hirohiko Araki has admitted that he's been essentially making up JoJosBizarreAdventure as he goes. While this is impressive in that the story likes to make a lot of call backs, it does explain the more "villain of the week" format that was in much of parts 3-5.
* While Creator/EiichiroOda of the ''Manga/OnePiece'' fame certainly doesn't do this all the time, he may actually be doing it more often than his fans - who almost worship him for his use of ChekhovsArmory - realize. He has admitted that some things were made up more or less on the spot:
** Vivi wasn't supposed to be the series' most well-known princess and honorary Straw Hat at first. She was just supposed to be a generic, short-lived ArcVillain even though TheReveal about her being a princess came few chapters later, meaning that Oda made that up rather spontaneously.
** Trafalgar Law was introduced extremely suddenly along with the other Supernovae because Oda's editor wanted him to make some interesting characters for the Sabaody arc. So even though he's a very significant character in Doflamingo's arc, his involvement wasn't planned during Doflamingo's first few appearances, neither was the fact that [[spoiler: he's a D]].
** Downplayed with the Going Merry: She was originally supposed to be the Straw Hats' ship for the whole series. Then Oda realized how underwhelming the little caravel looked compared to the ginormous enemy ships, and decided to "kill" her off and let the Straw Hats have a bigger ship. Still, her "death" was planned a couple of years before it actually happened, but it wasn't planned when she was introduced.

* The original writers of ''[[TheFlash Impulse]]'' admitted they were writing by the seat of their pants in the first trade. Given the character, this is quite appropriate.
* Prolific comic book writer Robert Kanigher did this all the time. The results run the full gamut from enduring classics to ludicrous dross (but it was ludicrous dross that was handed in on time, and that was the important thing). Among other things, he was prone to [[RecycledScript recycling plot details]], particularly [[FleetingDemographicRule from earlier issues of the same comic]]. To be fair to Kanigher, he had a very large monthly workload throughout his career, writing as many as ''seven'' comics each month and serving as editor for most of them.
* DCComics in general, during the SilverAge of comics, was infamous for using the following writing system: an editor would design a cover with whatever elements he felt would be popular (gorillas, dinosaurs, aliens etc.) or shocking events ([[SuperDickery death scenes of major characters, betrayals, pranks]] etc.) then he would give the cover to a writer and tell him to ''just come up with a story that made sense out of it.'' The results were often not very logical, but still enjoyable in their own way.
* Compare [[MarvelComics "The Marvel Method"]] from the same era: One writer would plot a story, an artist would draw the comic, then another writer would do the dialogue, often having to explain things all by himself. This is why Marvel was able to put about half a dozen or so comics each month even though the stories were devised almost exclusively by Stan Lee, Jack Kirby and Steve Ditko. Marvel used this system as late as the 80's.
* Chester Gould, the creator of ''ComicStrip/DickTracy,'' made up his stories as he went along. His maxim was that if even ''he'' didn't know where a story was going at the start, then his readers certainly wouldn't be able to guess.
** Though once he forced himself into a corner that he, at first glance, could only solve by having the eponymously named Dick Tracy tell Chester Gould to get him out of this situation and a giant hand erased the death trap. The news editor found it stupid so he told Gould to find another solution.
* ''Comicbook/JudgeDredd'' creator John Wagner has said this is the way he prefers to write. Case in point: the reappearance of [[spoiler:the Dark Judged]] in "Day of Chaos" wasn't originally planned, but with all that was going on in Mega-City One at the time, bringing them back was the perfect way to make things even worse.
* The revelation in ''Comicbook/NewAvengers'' that the Ronin was [[spoiler: Maya Lopez]] in disguise was a last-minute change after the original plan (where Ronin would have been revealed revealed to be [[Comicbook/{{Daredevil}} Matt Murdock]]) [[AbortedArc fell through]].
** This is rather evident from the fact that there is nothing even slightly androgynous about Ronin's very buff, masculine build -- and then he takes off his mask and s/he's now a typically beautiful comic book woman.
* Herge said that this was how he worked on ''Franchise/{{Tintin}}'' at the beginning of its life. He needed a new installment each Thursday and said that he often found himself working on it on Wednesday, not knowing how he'd get Tintin out of the mess he left him in last Thursday. He stopped doing this with The Blue Lotus and started plotting things out more fully.

* The author of Fanfic/GarfieldInAlongCameASplut apparently said that while the general idea of the story sat in his head for a while, the actual story was written in ''half an hour''--[[MindScrew and it shows.]]
* The writer of ''FanFic/StrikeWitchesQuest'', Planefag, has admitted a few times to doing this quite a bit and that it has gotten him into trouble of the plot hole sort.
* This backfired on the writer of the KingdomHearts / MyLittlePonyFriendshipIsMagic crossover Heart of Equestria, who was promptly overwhelmed by the various plots they introduced and ultimately cancelled the fic.
* [[FanFic.RainbowFactory Rainbow Factory]] as it went on. The author even stated that he was inspired by [[https://www.youtube.com/watch?v=YRx_iXgLAyw a song with the same name]] and thought to himself it would make a good DarkFic.
* How the first [[http://kleinerkiller.deviantart.com/gallery/41037509 Yognapped]] was written. It was first set as though LetsPlay/SimonLane and LetsPlay/LewisBrindley of the LetsPlay/{{Yogscast}}'s real-life counterparts were playing ''VideoGame/{{Minecraft}}'' and commentating, but moved on to an actual post-''ShadowOfIsraphel'' universe with the characters of Simon and Lewis' ''Minecraft'' avatars, alternating in-between for several chapters before settling on the latter. This led to some plot holes that the writer has attempted to {{Retcon}}, with varying degrees of success.
** To a lesser extent, the primary arc revolving around Notch and Herobrine came about entirely by accident. Herobrine's utterance of "[[spoiler: [[WhamLine I care as much about your citizens as our late sister cared about your temper]]]]" was changed at the last minute from a lame YourMom joke.
* The creator of ''FanFic/OriginStory'' admits that, while he began with a carefully plotted outline, the story left the outline in the dust in the middle of Chapter Four and that these days, he's writing whatever comes to him to write, as it occurs to him to write it. That said, he's still managed to put together an intricately constructed and emotionally engaging story, and it absolutely '''''does not''''' look like he's been improvising for the majority of the story.
* The writer of ''Fanfic/GimmeShelter'' admitted he came up with the idea for story after seeing a picture of the protagonist, Fleur de Lis, standing in the rain with no raincoat or umbrella then wrote the story in full within a few hours of having the idea.

* According to the book ''Literature/TheDisasterArtist'', everything that fans love about ''Film/TheRoom'' was [[ThrowItIn ab libbed]]. Tommy Wiseau was writing, directing, casting, rewriting, and acting by the seat of his pants, practically making up the film as he went.
* ''Film/{{Casablanca}}'' was being written as it was filmed. Some things had to be changed to comply with The Hays Code, and it took a while to come up with a satisfying ending.
* In ''Film/IronMan1'', the actors came up with so many good things on-set that halfway through they just threw away the script (having previously rewritten it every night) and instead wrote outlines of each scene instead. Creator/JeffBridges said that it felt weird doing it this way, then realized that he had to treat it "like a 200 million dollar student film".
* The second and third ''Franchise/PiratesOfTheCaribbean'' movies were both being written as they were filmed.
* Creator/TimBurton's ''Film/{{Batman}}'' was constantly being expanded, edited and rewritten. Burton himself once recounted a situation wherein he had SelfDemonstrating/TheJoker take Vicki Vale hostage and move into the Church, with no idea what to do storywise after that point.
* DavidLynch infamously wrote ''InlandEmpire'' scene by scene during filming. What effect this had on the film's [[MindScrew (lack of) coherence]] is up to debate. Seeing as it's David Lynch, however, [[CrazyAwesome it really doesn't matter too much]].
* ''[[Film/MagicalMysteryTour Magical]] [[Music/TheBeatles Mystery]] [[WhatDoYouMeanItWasntMadeOnDrugs Tour]]'' is an excellent example.
* The 90's movie of ''Film/TheFugitive'' was largely made this way, on the fly--although one would never suspect by watching it, as it ''looks'' very carefully planned.
* ''Film/TheLordOfTheRings'' movie trilogy was shot like that. Even as the cameras kept rolling, scenes and plots were being rewritten again and again - some versions of the script reached not just the double digits, but went up to 40 and above. Actors frequently got their lines only at the night before the shooting and major revisions resulted in whole scenes being re-shot. Ironically, the writers insist that each iteration was ultimately closer to Tolkien's work and even stated that some of the remaining controversial changes might have been gone too, had they not reached a deadline by then.
* Befitting its [[TroubledProduction chaotic production schedule]], ''Film/ApocalypseNow'' was made largely with this and ThrowItIn. Francis Ford Coppola didn't even have an ending, as he'd considered John Milius's ending (Willard joins Kurtz, and the film ends with Kurtz shooting at American war planes bombing his temple while screaming about his erection) ridiculous.
* ''Film/{{Scanners}}'' was written like this, which was forced upon Creator/DavidCronenberg because of the way the production had to be structured due to financing reasons. There was virtually no pre-production, so he had to start shooting with an unfinished script. He would write in the morning, and film the rest of the day, mostly out of order. On top of ''that'', they often had to drive around at random, looking for places to shoot scenes. So literally ''everything'' about Scanners was done by the seat of their pants. He talks about it at some length in ''Cronenberg on Cronenberg''.
* ''StrangerThanFiction'' has an in-universe example. We see Karen Eiffel writing ''Death and Taxes'' while she's still trying to figure out the ending.
* ''Film/LawrenceOfArabia''. Shooting was just about to start when David Lean threw out Michael Wilson's original script completely. Robert Bolt was brought on to rewrite the script as filming began. As a result, the movie was filmed almost chronologically - a rarity then or indeed now, especially on such a large-scale film.
* Creator/StanleyKubrick seemed to be this for many of the cast members during production of TheShining. He would often spend the morning before shooting on completely re-writing the scenes that were to be shot that day, causing more than one of the [[Creators/ShelleyDuvall actors]] to almost have a nervous breakdown, although that was a combination of this and Kubrick's perfectionism on takes. It has been argued, given his chess background, that this and other psychological tactics on the shoot were him being a MagnificentBastard to get the performances he wanted.
* During one of his Q&As, Creator/KevinSmith admitted to have written ''Film/RedState'' without a clear plan in mind. He only had two thoughts in his head: the overall topic (a horror movie inspired by a Fred Phelps interview) , and the idea that the audience nowadays has already seen every story and knows every formula and cliché. The challenge he gave himself was to jump to a different scene with a different set of characters the moment he knew where the scene he was currently writing could be heading.

* An excellent summation of this trope from E L Doctorow: "It's like driving a car at night. You never see further than your headlights, but you can make the whole journey that way." (also quoted by Anne Lamott).
* Creator/RayBradbury fleshed out his short story ''The Fireman'' into the novel ''Literature/{{Fahrenheit 451}}'' at a pay typewriter in 9 days.
** There's a famous Bradbury quote on his method of writing that pretty eloquently sums up this trope: "You've got to jump off cliffs all the time and build your wings on the way down."
* Creator/IsaacAsimov was on record stating that, while he usually had an end in mind, he almost never had any idea how he'd get there.
* Creator/GarthNix says this is how he writes - most of his world building is made up on the spot.
* Creator/StephenKing falls into this category -- he never plans ahead, he just writes until he has a good idea and runs with it.
** ''Literature/TheGreenMile'' may be his best example of this. It was originally released in installments. At the time the first installment was released to the public, he hadn't even figured out the ending yet... but still a set release scheduled for it.
** King said in ''On Writing'' that he does ''occasionally'' plot his stories, he just does it rarely because he usually isn't proud of the results (like ''Rose Madder'' and ''Literature/{{Insomnia}}'') when he does--with one exception: ''The Dead Zone''.
* Creator/CoryDoctorow wrote ''Literature/LittleBrother'' in eight days.
* The NaNoWriMo project lends itself to this approach. Participants are given 30 days to see if they can write at least 50,000 words. [[note]]Not all [=NaNoWriMo=] writers write by the seat of their pants. The rules allow writers to have character sketches, plot summaries, and even extensive, detailed outlines -- as long as none of the actual prose is written before 12:00 AM on November 1.[[/note]]
* The Reverend Lionel Fanthorpe [[ExtrudedBookProduct churned out novels for Badger Books]] on the basis of a book cover, a title and a very short deadline. Badger's policies mean it's impossible to tell exactly how many he wrote, but the estimate works out at one 158 page book every twelve days. To manage this, he dictated into a reel to reel tape recorder, then shipped the tapes off to a pool of typists for transcription. To hit the word target, he would [[{{Padding}} pad out]] the books with philosophical discussions, mundane detail and [[DepartmentOfRedundancyDepartment redundant descriptions]] (robots: "Metal things. Metal things that could think. Thinking metal things"), but then could be told that he had only three pages left to wrap up the story, so he had to [[AssPull pull out]] a DeusExMachina. Despite, or perhaps because of all this, Fanthorpe's work has picked up a SoBadItsGood following.
* Creator/LRonHubbard claims he wrote by meditating into a trance-like state and typing constantly for hours at a time. According to Creator/HarlanEllison, Hubbard used the Jack Kerouac method -- he rigged a roll of butcher paper of the appropriate width to feed into his typewriter, wrote for several hours, and at the end cut the long sheet down into even pages.
* Creator/JRRTolkien wrote ''Literature/TheLordOfTheRings'' this way as revealed in ''[[Literature/TheHistoryOfMiddleEarth The History of Middle-earth]]''.
* Creator/DouglasAdams wrote ''Literature/TheHitchhikersGuideToTheGalaxy'' this way largely - throw out tons of ideas, then return later when it seems like one of them is funny or could be made relevant (like the potted plant saying "Oh no, not again"). As you can imagine, Adams was terrible at deadlines and finished the first book at that page because his publisher was furious. He once remarked, "Writing is easy. You just stare at a blank page until your forehead starts to bleed."
* Robert B. Parker of the {{Spenser}}, SunnyRandall and Jesse Stone series wrote like this, and compared it to being like the detectives of his novels never knowing what was coming next.
* Horace Kelton once replied to a friend that he didn't know "what [his] next book would be about. [[IJustWriteTheThing The characters [hadn't] told [him]]]." But he still planned some once he got the basic idea.
* Creator/CharlesDeLint writes that way and refers to it as an "organic" style of writing.
* Creator/TerryPratchett usually writes with a plan, but in an interview said that while writing the assassin's "driving test" in ''Discworld/{{Pyramids}}'', he had absolutely no idea how it would unfold, and consequently it is one of his most favorite moments in the ''Literature/{{Discworld}}'' series.
** When he sat down to write ''Discworld/GuardsGuards'' he intended for [[TheCape Carrot Ironfounderson]] to be the main character, with [[KnightInSourArmor Samuel Vimes]] being a minor character who was there to provide a viewpoint character in the city before Carrot arrived. As he wrote the novel Vimes took over as the main character.
* Creator/HarukiMurakami swears to this type of writing, never knowing the ending when he begins a story. [[WhatDoYouMeanItWasntMadeOnDrugs It shows]].
* Creator/StanislawLem wrote ''Literature/{{Solaris}}'' that way. It is considered to be his best book which is saying something, because his other works are nothing short of brilliance.
* The cast of ''Podcast/WritingExcuses'' have often talked about the difference between being a outliner vs. a discovery writer. DanWells, author of the ''[[Literature/IAmNotASerialKiller John Cleaver Trilogy]]'' is a self-confessed discovery writer, but Creator/BrandonSanderson is very much an outliner.
* HunterSThompson not only did this, he made it the essence of Gonzo journalism: Your notes, more or less unedited, ''are'' the finished product. He would frequently spend hours or days locked up in his room with a typewriter, a whole bunch of paper, and half a ton of drugs and booze, hammering away furiously to send a long, rambling, yet somehow incredibly cogent piece off to ''Rolling Stone'' or whatever other publication he was writing for at the time. He famously declared his most famous work, ''Literature/FearAndLoathingInLasVegas'' to be a ''failed'' experiment in Gonzo journalism, as he had edited it too much.
* Ellen Potter, author of ''The Kneebone Boy'', had no idea how it would end when she wrote it and was, at her own admission, stuck on the ending for months until writing something that came to her at the gym. Unfortunately, a lot of plot threads are left dangling as a result.
* The 20th Anniversary Edition of TimothyZahn's ''[[TheThrawnTrilogy Heir to the Empire]]'' has a lot of notes in the margins, which reveal that the book changed a ''lot'' during the process from first draft/outline to completed manuscript. Most big ideas were set early on, but small details seem to have come spontaneously, like Luke drinking hot chocolate. He also threw in a consistently varied selection of cryptic side references, mostly used to make the galaxy feel bigger, like the films did. Later many of these were picked up in order to perform some remarkable feats of ArcWelding - but as he notes while explaining,
--> Still, don't let all these clever explanations give you the impression that I had this whole immense thing mapped out in advance. Right now, I'm using [[IndyPloy the Indiana Jones approach]], and making it up as I go.
* Creator/GeorgeRRMartin describes the technique like taking a road trip. You know the broad strokes of the trip--where you start and where you end, and maybe some of the major roads you'll be driving along the way. But you don't know what diner you'll be eating at on day three; you don't know about the construction on the I-95; you don't know that you'll stop at a tourist trap you didn't even know existed during the detour...
* Calum P Cameron apparently writes the ''Literature/MediochreQSethSeries'' by formulating a basic plan, typing until he gets stuck, then walking his pet dog until he spontaneously comes up with enough new scenes to start typing again. Or he did, until [[https://www.facebook.com/MediochreQSethSeries/posts/590362237660422?comment_id=6649001&offset=0&total_comments=5¬if_t=feed_comment the dog died.]] Presumably he still adheres to the trope, though, just without the dog-walking bit.
* The authors of ''Literature/{{Animorphs}}'' had no plans at all for the overarching plot going in - they came up with a plot synopsis before each book, but beyond that, they didn't have a clue. (The one exception seems to be their knowing ahead of time that [[spoiler: Rachel would die]] at the end.)
* LoisMcMasterBujold, author of the VorkosiganSaga, has stated that she writes like this, comparing her style to the meticulous and structured method of her friend and fellow author PatriciaCWrede
* An variant of this trope is when the author lets dice (or any random generator) decide over the plot. "Paradise of Swords" by Tobias Meißner is a good example - almost an RPG-as-book. Probably better known is "Il castello dei destini incrociati" by Italo Calvino.
* The author of ''Literature/DestinedToLead'' claims this as her main writing style. Not surprising as the books were written during NaNoWriMo.

[[folder:Live-Action TV]]
* In the original KTMA season of Series/MysteryScienceTheater3000, the riffs were improvised rather than written. The films being mocked hadn't even been seen in their entirety in advance. In the ComedyCentral era, however, each film was carefully screened and written for before its respective episode was recorded. The show became [[GrowingTheBeard better for it]].
** During the first season, movies weren't watched in their entirety until the actual writing process took place. They changed to pre-screening the whole film after viewing the violent rape scene in ''The Sidehackers''.
* ''Series/BattlestarGalacticaReimagined''. The writers' commentary on the DVD makes it clear that ''a lot'' of stuff was made up episode-by-episode. Especially irritating when every episode began with the statement "... and they have a plan." Many viewers found this especially apparent in the plot points involving the identity of the Final Five cylons, leading to images like [[http://i.crackedcdn.com/phpimages/photoshop/9/2/6/125926_v1.jpg this one]]. It really came back to bite them when they decided that the "Final Five" Cylons should be different than the others, and have the last five model numbers. Trouble was, it had been built in the show from the start that there were twelve models, and they'd already given one of them the number Eight. So the writers had to quickly insert a piece of backstory that another model had been judged so corrupted (read: wanting to be human) that all copies were destroyed permanently.
** Another issue this caused was that [[spoiler:Tyrol was made one of the Final Five despite having a son, due to the writers forgetting that Cylons couldn't have children. When they realized this halfway through the final season, it was quickly retconned that his son with Cally was actually the result of Cally having a one night stand with Hot Dog the night before they began dating. And then the episode wasn't quite as clear as it could have been that this was what happened, leaving many fans with the impression that Cally (now long dead and unable to defend herself) had cheated on Tyrol. Also keep in mind that Cally had ''never'' shared a scene with or even spoken to Hot Dog before. Ever. In the DVD commentary, Ron Moore admits that he came up with this retcon simply because they'd built up Hera as the special Hybrid child so much that it wouldn't make sense to have two Hybrids - which was the ''entire criticism'' about making Tyrol a Cylon in the first place.]]
** As for the identities of the Final Five Cylons, [[spoiler: Ron Moore's explanations in the DVD commentary make it clear that he picked them all based on ''shock value'', rather than in-universe story logic. That is, rather than describing "that suspicious thing Tyrol did in episode 3.01 was supposed to be a hint that he's a Cylon", Moore spent the DVD commentary (i.e. of the Season 3 finale) discussing that he picked these characters based on the shock it would cause - even though there was no setup, with candidates ranging from the coincidental (Anders), the implausible (Tigh), to the impossible-without-contradicting-ourselves (Tyrol).]]
* WordOfGod has admitted that they started writing ''TwinPeaks'' not knowing who had killed Laura Palmer.
** The series has many examples of ThrowItIn and such but the identity of the killer wasn't meant to be revealed in the first place and happened only because of ExecutiveMeddling. This, of course, doesn't make it any less this trope, or rather it could be considered even better example.
** After revealing who killed Laura Palmer they didn't have a clear idea how to keep Agent Cooper in the series, and with Lynch busy on over projects, the writers struggled throughout series two for the show to have a focus.
* The vast majority of [[SoapOpera soaps]] work on this principle. It's essentially the nature of doing a work "live." RealLifeWritesThePlot sometimes contributes to this trope, especially for things like pregnancies.
%%Do not re-add Lost. Word of God has disproved this. Even if the exact details weren't planned out, the team worked out an end date of a sixth season during production of season 3.
* ''Series/BreakingBad''. While the writing wasn't exactly freestyled episode-by-episode (barring Season 3), there were some notable instances:
** Jesse Pinkman was supposed to die somehow in Season 1, until Aaron Paul's acting chops convinced everyone to keep him on.
** Gus Fring was only supposed to be on for a few episodes in Season 3, but his actor (Giancarlo Esposito) demanded more.
** On that note, Gus Fring was created because Raymond Cruz (who plays Tuco) had to leave for his role on The Closer. Tuco was supposed to be the villain all of Season 2.
** When the M60 was introduced in Season 5, ''the writers had no idea how it would be used.''
*** A more minor bit in the same development: Walt takes off the watch Jesse gave him and leaves it on top of a pay phone, for literally no reason except that he hadn't been wearing it in the flashforward scene.
* Parodied in a ''KidsInTheHall'' sketch, which warns the viewer that it was "written in haste," showing the writer frantically mashing a keyboard trying to finish it within the deadline. The scene is filled with nonsensical actions and garbled dialogue caused by the typos, such as a man taking off his "rubber boobs" and sitting down on a "chain."
* Aaron Sorkin does this. There's a story that when he was writing TheWestWing, he needed President Bartlet to be lying in bed for a scene -- and so gave the character ''multiple sclerosis.''
** Matt, his partial AuthorAvatar, does this in-universe in ''Studio60OnTheSunsetStrip''.
* Many committee-led series will change plot and emphasise characters depending on audience responses to broadcast episodes. Sylar and Hiro in ''Series/{{Heroes}}'' received such a favourable response they were given much larger roles in the long run [[spoiler:including Sylar being allowed to live beyond the Season 1 finale.]]
* The writers of ''{{Series/Glee}}'' seem to be really, very, extremely guilty of this, partially because of their fondness for PanderingToTheFanbase and partially because they think of the show as a "pop-culture tribute" and basically just write around whatever's currently popular or of note in some way. And they also just [[ShrugOfGod change their minds]] a lot, like when Ryan Murphy broke up Quinn and Sam because he "got bored" with them. Overall, this keeps the humor of the show extremely up-to-date and relevant, but it also leads to many, many [[OutOfCharacterMoment out-of-character moments]] that some viewers find annoying.
* A relatively small point: [[SuddenlyEthnicity declaring Elaine not to be Jewish]] in ''Series/{{Seinfeld}}'' was something Creator/LarryDavid or JerrySeinfeld or ''someone'' had literally just thought of when the opportunity came to write about "[[ShiksaGoddess Shiksappeal]]." She had previously been considered by the writers and inferred by the audience to be Jewish (after all, [[Creator/JuliaLouisDreyfus Julia Louis-Dreyfus]] is).
* The series finale of ''Series/ThePrisoner'' was written in a trailer over a weekend. Not surprising that it's one of the most infamous {{Mind Screw}}s in television history.
* ''Series/TwentyFour'' was notoriously written on the fly, with the writers starting each season with practically no concrete idea where the thing was going to end up. Notably averted by Season 7, due to the 2007 Writers Strike and a year-long delay, resulting in a much more cohesive, planned-out storyline for that season.
* ''Series/DoctorWho'', partly by necessity. While an individual head-writer/producer might have individual plans, the show's LongRunner status means that this is a little bit necessary. For example, a lot of the things that have made the show so iconic, such as TheNthDoctor trope or the Daleks, weren't planned, but added as they went along.
* The creators of ''Series/TheBigBangTheory'' have commented that every season they start with simply the next page. Chuck Lorre apparently has a motto that "This isn't ''Series/{{LOST}}''" and thus they keep everything in the moment and not holding out based on what they have planned. Although looking back it would be easy to believe they did plan out at least a season in advance, given the progression of Leonard and Penny's relationship in the first two seasons and how Howard started to mature in the second season which allows him to start a relationship with Bernadette in the third.
* The famous cliffhanger at the end of ''[[Series/StarTrekTheNextGeneration The Best of Both Worlds, Part I]]'' was due to the Star Trek TNG writers not knowing if Patrick Stewart would return as Picard or not, forcing them to pause there and then write Part II by the seat of the pants once they found out about Stewart. Luckily, this turned out extremely well and the two-parter is still considered one of the entire ''Trek'' franchise's all-time greatest moments. Not so luckily, this encouraged the writers to ''keep on doing it'' at the end of each season on every ''Trek'' show from then on, which naturally had increasingly diminishing returns.
* ''Series/NYPDBlue'' was often written on set during filming due to head writer David Milch's drug use. "OK, you [Sipowitz] say this, and then you [Simone] say this in response." Actors wrote down their lines on scraps of paper in the squad room. JimmySmits and other actors quit over the hectic scheduling.
* ''Series/HowIMetYourMother'' starts with a DrivingQuestion of "How does Ted meet the future mother of his children?" and the creators were adamant that it would happen in the GrandFinale. The thing is they weren't sure how long they would get to tell this story and there are several admitted plans in place in case they were or were not renewed. Victoria of season one was outright confirmed to be the Mother in case the initial 13 episode order was all they had. Stella is theorized to also be a back-up Mother (given how they meet ties directly into the implied "MythArc") if season three was the end. Once ratings stabilized it seemed that the writers had a clear idea of how the show would end by introducing some more solid clues (the [[MilestoneCelebration 100th episode]] has Ted meeting the Mother's roommate and getting a lot of, still vague, information on her) but still had to keep things flexible because now they weren't sure ''when they were ending.''
* ''{{Series/LOST}}'''s pilot and first six episodes were written with only the vaguest of long-term planning (i.e. "Locke will find a hatch sometime, and there's a science compound, and maybe we'll reveal [[spoiler:two gods were playing a game the whole time]].") because Damon Lindelof admitted he didn't think [[{{Cancellation}} the show would last]]. He just cribbed the flashback structure from ''ComicBook/{{Watchmen}}'' and wrote whatever interested him while waiting for the cancellation notice. However, when the ratings came in, he teared up in exasperation and asked, "You mean we have to keep doing this every week?!" He put in a call to his old boss, Carlton Cuse, who came onboard after "Confidence Man" and helped him sketch out a very rough outline, but they soldiered through the rest of the first season by ad-libbing it, including the infamous "numbers". It wasn't until the summer break that they spent a month planning out the rest of the MythArc.
** Lampshaded in a "Weekend Update" skit from SaturdayNightLive, where Amy Poehler reported that ''Lost'' had been renewed for another two seasons.
--> '''Poehler''': When reached for comment, the writers of ''Lost'' said: "[[OhCrap Crap]]."
** Alluded in a PennyArcade [[http://www.penny-arcade.com/comic/2006/11/01 comic]] :
--> '''Tycho''': "Jack, Kate and Sawyer. You know who else is lost - the fucking '''writers'''".
* Julian Fellowes only writes the first half of each series of ''Series/DowntonAbbey'' ahead of time, then waits to see how the actors play off each other before writing the second half. Occasionally this has bitten him in the ass when he decides to expand a character's role only to discover the actor isn't able to put in the time, most notably with Edith's paramour Gregson.

* The entire concept of "jamming": musicians will spontaneously come up with music to match an overarching, usually repetitive, tune going off of nothing more than their instinctive abilities.
* ElvisCostello recorded the album ''Momofuku'' in six days. He joked that "the record was made so quickly that I didn't even tell myself about it for a couple weeks."
* DavidBowie's preferred methodology of song writing. Tony Visconti, his long time producer, has confirmed that Bowie will often come to the studio with just a few chord changes and write the lyrics and vocal melodies on the hoof.
** Notably, his #1 hit collaboration with {{Queen}}, "''Under Pressure''" was the result of a single night spent jamming with them - which was very different to the usual manner in which Queen made music.
* PostRock band Mogwai's first full length album, ''Mogwai Young Team'', contains 10 songs, only 3 of which had been written before the album's recording sessions began.
* Songwriter Rod Temperton, who composed Music/MichaelJackson's hit "Thriller", wrote Creator/VincentPrice's spoken-work portion of the song mere ''hours'' before the recording session began!
* Martin O'Donnell, the composer for the ''{{Franchise/Halo}}'' series, tends to not write or compose music for projects until late in development, once the story, cutscenes, and level design have been finalized. The reason for this is because he doesn't like to waste work; writing music for levels or cutscenes that will get cut out or rearranged will either mess with the flow of a piece or become pointless effort. Fast writing has worked for him in the past; the iconic ''Halo'' theme was written and recorded the same day it was sent to Bungie for E3 2000, and much of the acclaimed music for ''Halo 3'' was described by him as "starting last minute".

[[folder:Professional Wrestling]]
* In pro wrestling jargon this trope is referred to as "hotshot booking" or "hotshotting." While there are many examples of hotshotting in the industry, one of the more famous occasions was during the WCW vs. WWF rivalry in the late 90's, when shows were often changed on the fly in response to something the competing federation was up to.
* The position late 2013/early 2014 [[Wrestling/BryanDanielson Daniel Bryan]] has been in smacks of this. After setting up a seemingly interesting storyline between a now-{{heel}} Wrestling/TripleH (playing the CorruptCorporateExecutive) and a [[TheChosenOne chosen champion]] Wrestling/RandyOrton, Bryan got shoved into the background of his own feud after the Hell in a Cell pay-per-view and basically sat on the sidelines (feuding with Wrestling/TheWyattFamily) during the run-up to the TLC event (where Orton and Wrestling/JohnCena were scheduled to unify the WWE and World Heavyweight championships). Fan reaction towards this was overwhelmingly negative and only got louder when Wrestling/{{Batista}} returned and won the Royal Rumble (at a time when everyone expected Bryan to pull it off). Eventually this fan reaction hit home in the creative department and Bryan's very short [[HeelFaceRevolvingDoor two week face-heel-face turn]] in January[[note]]Apparently caused by sports fans using the "YES!" chants at games[[/note]] and the leadup to [=WrestleMania=] XXX is showing a drastic change in plans from the original blueprints. It's likely had things gone as were planned, the main event of Batista vs. Orton at [=WrestleMania=] would have been the end result.

* This is how Creator/DouglasAdams wrote the original radio scripts for ''Radio/TheHitchhikersGuideToTheGalaxy''. Apparently, he'd often still be rewriting the ends of episodes as the cast were recording the beginning. According to a making-of feature, the actor who was supposed to play the Ruler of the Universe (who appears in the final minutes of the last episode of season two) actually ''went home'' because it took Adams so long to finish the script. The role was cast by handing the pages to the one actor still in the studio who didn't have another part in that scene. In fact, the second series' deadlines for the scripts were so tight that his producers essentially locked him in a hotel room to force him to hit them.
** Adams would often lock himself in a small office next to the toilets to finish scripts. This, combined with the fact that the scripts were handed to the actors on little pieces of crinkly paper, [[UnfortunateImplications led to the not unreasonable supposition among the cast that the scripts were written on toilet paper]].
** Extremely major characters were accidentally created this way - Zaphod Beeblebrox first appears in Fit The First as the person to whom a quote about Pan-Galactic {{Gargle Blaster}}s is attributed in one of the story's many {{Cutaway Gag}}s, with the hint 'we will learn more of his wisdom later'. After having both Ford and Arthur chucked out of an airlock into space with no spacesuits as a cliffhanger just because he thought it would be funny, and being unable to come up with a solution for saving them that wasn't a total DeusExMachina, he decided to exploit the improbability of their being saved by coming up with a spaceship powered entirely by improbability, creating the Infinite Improbability Drive. In order to find a pilot for the ship, he quickly grabbed the name Zaphod Beeblebrox to make it look like {{Foreshadowing}}, fleshed out his position in an interesting way, and added in the character of Trillian to act as a ''Doctor Who''-like companion figure for him.

* The [[BigBulkyBomb Tsar Bomba]] was designed while it was being built, due to having mere ''weeks'' to build the biggest nuke ever detonated.

[[folder:Web Comics]]
* ''Webcomic/PennyArcade'' is written without a StripBuffer, so the creators can stay up-to-date on gaming news. Different reason for the trope, same idea. It helps that it's a gag-a-day strip, rather than needing any sort of continuity.
* ''Webcomic/BobAndGeorge'', especially at the beginning, when it was just filler.
* {{Interactive Comic}}s:
** ''Webcomic/MSPaintAdventures'', especially in the earlier adventures. The latest adventure, ''Webcomic/{{Homestuck}}'', is the only one to have any sort of planning before being written, having started with the four central characters, their [[WeaponOfChoice weapons of choice]], some [[InventoryManagementPuzzle general]] [[ItemCrafting game]] [[RealityWarper mechanics]], and a handful of plot points, including an ending, worked out beforehand. The rest of the universe-spanning, time-traveling, chronology-fucking, nearly 4000 pages of extremely convoluted plot has been made along the way.
** ''Webcomic/SilentHillPromise'' is written similarly to ''Webcomic/MSPaintAdventures'', updating daily using commands from readers.
* ''Webcomic/QuestionableContent'' gets points for being a Monday through Friday comic that is not only drawn without a StripBuffer, but is written and drawn by Jeph Jacques literally the night before. Sometimes if he's struck by a burst of inspiration, he'll do two comics in a day, waiting to post the second one, and sometimes if he's stuck for an idea he won't start drawing until 3 AM...
* This is [[Webcomic/{{Walkyverse}} David]] [[Webcomic/DumbingOfAge Willis']] method of writing, as he goes into detail about [[http://itswalky.tumblr.com/post/21196582462/whats-your-general-routine-for-writing-drawing-a here]]
* Webcomic ''Webcomic/TheTruthAboutBleach'' mocks Bleach's tendency to do this:
-->'''Karin''': (Trying to pick up on a dropped plot point) Can I get in there and continue the plot.
-->'''Kubo''': Screw the plot! The rankings dropped! Now I'm drawing this!"
-->'''Karin''': See, this is the kind of plot hole inducing mind set we were talking about before.
-->'''Kubo''': Worry not!! [[ComicallyMissingThePoint I will fix it with an awesome plot twist later!!]]
* Creator/UrsulaVernon has gone on record as saying she expected ''Webcomic/{{Digger}}'' to be over in the first twelve pages or so. Needless to say, it wasn't-- it took four years and almost eight hundred pages for Digger's story to be fully told, and that's not counting the side stories that went in the printed editions.
-->'''TheRant:''' ''On the off chance that anybody thinks that this is the end of a dreadfully cunning six-year plan, conceived when first I wrote the lines about [[ChekhovsGun the lefthand names of God and purple ink]] - let me just say "BWHAAHAHAHAHA...no."''
* Repeatedly on the forum for ''Webcomic/TheWhiteboard'', Doc Nickel has admitted that he makes up the strips as they go, without any previous planning. This has occasionally resulted in an AbortedArc like one year's Thanksgiving storyline.

[[folder:Web Original]]

* Many online roleplays.
** The trip to the past in [[http://www.greylabyrinth.com/discussion/viewtopic.php?t=14310 What Time Remembered]] was entirely made up on the spot.
* The ''{{Franchise/BIONICLE}}'' serials are apparently written like this, although the main plot is carefully planned out years in advance. The serials tend to cover the lesser-known characters and don't affect the main story much, so they are able to have this sort of freedom.
** Now, as there is no main plot to be told, the serials took over. This means the entire story has become an example.
* ''DarwinsSoldiers'': [[WordOfGod Serris]] states that ''nearly everything'' he write was improvised on the fly, ''including the two sequels''.
* [[Website/TheAgonyBooth Mr. Mendo's Hack Attack]], nowadays, is completely improvised and more or less created entirely through the editing process. Ironically, this has led to new episodes coming out more frequently.
* wildbow, author of ''Literature/{{Worm}}'', makes a point of this as one way of making the writing process more interesting for himself. Virtually every chapter of Worm is written just the day before publishing, often finishing shortly before the midnight deadline, and he has set himself a minimum-length of 6000 words. He has missed an update only twice-both by mere minutes, and both times due to technical issues.
** Despite this, much of the plot itself was planned out prior to writing; [[WhamEpisode Interlude 26]] had been planned for since the very beginning, according to WordOfGod.
* Ursula Vernon, the author of Webcomic/{{Digger}}, commented several times that she knew the general outline of the story but not the details, and a number of plot elements she introduced early on that later became important [[ChekhovsGun Chekhov's Guns]] were never really intended to be at the time; the weird little details that never turned into anything look like they're just world-building, while the ones that did become important later make it look like she had a huge intricate plan all along.
* The storyline [[GratuitousJapanese "manga"]] on ''GaiaOnline'' tells an unbelievably convoluted story. It's so twisty and [[ShockingSwerve swerve-y]], in fact, that the writers and artists responsible for pushing out storyline updates have joked that even they stopped paying attention to what happens at some point or other.

[[folder:Western Animation]]
* According to the DVDBonusContent, ''WesternAnimation/{{Freakazoid}}'' was written with very little planning because of time constraints.
* ''WesternAnimation/TheRenAndStimpyShow'' never had real scripts. The creators went straight to storyboards and improvised each subsequent image.
* ''WesternAnimation/YellowSubmarine'' began production without an ending.
* Most episodes of ''WesternAnimation/SouthPark'' are pitched, storyboarded, written, animated, voice-recorded, and put on the air in the stretch of about one single week, one episode at a time. To contrast, most animated series take nine months per episode, with several episodes being in various stages of production at any given moment. This is why ''South Park'''s topical humor is more current than, say, what ''TheSimpsons'' does. The only time this trope backfired on them was when "Goth Kids 3: Dawn of the Posers" from season 17 had to be postponed due to a power outage.
* The writers of ''WesternAnimation/BeastWars'' admitted in DVDBonusContent that they were winging it as they were going along. They also said that things went UpToEleven around the time of the season finales as they weren't always sure they would get renewed for another season so they just adopted a "kill them all, let Hasbro sort it out" view when writing these episodes. This led to one particularly infamous moment where Inferno is '''utterly vaporized''' in a scene ''clearly'' intended to be a death scene. In the next season he turns up burnt but otherwise unharmed.
* If WordOfGod is anything to go by, ''WesternAnimation/AdventureTime'' is half carefully plotted out and half completely made up on the fly. This leads to such things as Princess Bubblegum turning 13 then being turned back to normal in the next episode because the writers weren't sure what to do with a plot point like that or Lemongrab becoming a full-blown cast member despite being intended to never appear again after his introductory episode.
* Creator/GenndyTartakovsky claims that he didn't see most of the ''WesternAnimation/DextersLaboratory'' episodes he made until they aired on TV.
* Creator/DonBluth attempted to do this with ''WesternAnimation/ATrollInCentralPark'' and [[TastesLikeDiabetes regretted it for the rest of his life]].