* AlternateCharacterInterpretation: Naota's older brother. Is he a giant asshole that left everything just so he could be a baseball player? Or is he a nice guy who just isn't good with people? Is he a giant asshole or did Mamimi just completely overestimate their relationship?
* BetterOnDVD: This series is an OVA, after all. At six episodes, you can comfortably get through the whole thing in an evening, albeit a very weird evening.
* CrazyAwesome: Everyone and everything, but especially Haruko.
%% See CrowningMoment/Anime and HeartwarmingMoment/Anime for Crowning Moments of Stuff.
* CrowningMusicOfAwesome / {{Earworm}}: Much of the music due to the driving guitars and hyper-catchy refrains used, respectively.
** "Ride on Shooting Star".
** "I Think I Can" qualifies as well, helped along by being the song played during the last episode's climax.
** "Hybrid Rainbow"
** "Blues Drive Monster"
** "Little Busters", the 'awesome climax' theme.
** Really, Adult Swim commented during the show they believe FLCL has the best soundtracks of all their shows.
** The fact that ThePillows accounted for almost the entirety of the show's soundtrack is probably a Crowning Moment for them.
* DracoInLeatherPants: Haruko being CrazyAwesome personified ends up absolving her of [[spoiler: trying to destroy the world and kill Naota]] in the eyes of most fans.
* EnsembleDarkhorse: Kitsurubami is very popular in the fandom for her minimal screen-time.
* FauxSymbolism: A minor example, but the gigantic hand has a hole straight through its palm during episode 5 and the first half of 6, as if it had been nailed to a cross.
* FountainOfMemes: '''Haruko'''. Practically everything she says or does has gone memetic.
* FreudWasRight:
** Canti's gun, Naota's 'protrusions'... there's more phallic imagery than some ''hentai''.
** Haruko's reactions to her electric massage.
** The manga adaptation was [[SerialEscalation even more explicit about it]].
* GatewaySeries: The soundtrack acts as the perfect gateway to ''ThePillows''. As a gateway series to the genre of ''anime'' however, it's probably not the best choice (unless you're one of those people who believe that Japanese cartoons are weird and/or sexually deviant, and you need proof of this for your friends).
* {{HSQ}}:
** Episode 5: Haruko [[spoiler:surfing on (in midair) and using a bass guitar]] to take down a [[spoiler:multi-story five-armed gunman robot that's actually a giant hand (each "arm" is a finger)]] - while wearing a PlayboyBunny suit. That's not something you see every day, folks. The end of the series counts too.
** Haruko wearing a PlayboyBunny suit during that batshit insane battle is actually a reference to one of the opening videos a group of amateur animators made for DAICON in 1982 and 1983 before they later formed Gainax. To drive the point home, Haruko even shouts "Daicon!" in that scene.
** When Amarao opens fire on her in the barbershop, Haruko wields ''a razor'' and slices ''each and every bullet perfectly in half without effort''. Cue dozens of [[TheMenInBlack Men in Black]] with machine guns storming the place, and Haruko proceeds to defeat all of them without breaking a sweat.
---> '''Amarao:''' ...[[LampshadeHanging you can't be real]].
** Episode 4: Naota saves the city from [[spoiler:a hand-shaped robot satellite that falls from orbit and ''pitches'' a gigantic baseball-shaped bomb at the city]], using [[spoiler:an electric guitar that Haruko pulls from his head to ''bat'' it]]. Yeah.
** Let's be honest: the ''entire series'' has an absurdly high HSQ.
* MoralEventHorizon: Haruko feeding Naota to the Terminal Core, probably expecting that it would kill him, and knowing for certain that doing so could result in the demolition of the entire planet, all so she could "get what I want." It's worse in hindsight - she abandoned Naota like Amarao when she thought she had successfully extracted his power into Canti, and only returned when it became obvious that this wasn't the case.
* MostWonderfulSound:
** The ''''''BRNNNNNNNNNNNNNNNGGGGGGGGGGGG''''' when Haruko's bass guitar hits something.
** The droning "Air raid siren" that eminates from Medical Mechanica, which usually means [[CrowningMomentOfAwesome something bizarre and awesome is about to happen]].
* NightmareFuel: The scene with the (fake) Kamon corpse. "Sometimes you're the cat, sometimes you're the mouse."
* SuperlativeDubbing: Many Western otaku who are otherwise skeptical or outright hostile [[HateDumb towards the dubbing of Anime]] ''love'' the dubbing of ''FLCL''. The series was thought by many otaku to be un-dubbable due to its use of Japanese puns and pop culture references. Synch-Point, the American dubbers, instead replaced those instances with comparable English puns and cultural references. As for the voice actors, the original director of the series supposedly hand-picked the English-language voice actors himself, because it was vitally important to him that they have the same "essence" as the Japanese actors. He was particularly impressed by Haruko's voice actress, KariWahlgren.
* ThisIsYourPremiseOnDrugs: The show does have its share of batshit insanity. And like a drug trip, you can find some nuggets of true brilliance while your housekeeper with a chainsaw engine powered guitar and robot that popped out of your head join you magic adventures.
* ToyShip: [[spoiler:Naota and Ninamori]]. At the very end, it's implied that they'll probably get together eventually if not almost immediately. It helps that it's definitely the healthiest male-female relationship on the show, and [[spoiler:Ninamori]] herself always had the most sincere affection for [[spoiler:Naota]]. In a ShipTease, [[spoiler:Ninamori]] rigs the play just so she and [[spoiler:Naota]] get certain parts. Also the fact that she unashamedly reveals this to [[spoiler:Naota]] while holding his hand.
* VisualEffectsOfAwesome: The manga sequences in episodes 1 and 6. They better damn well be, since they both took massive chunks out of the show's budget.
* {{Woolseyism}}: A significant portion of the dialogue had to be replaced for the English version, since the jokes would only make sense in Japanese, and they were replaced by comparable Western jokes and references. One example is the mention of Crystal Pepsi. In the Japanese version this was "Cherio Pop", a gimmicky Japanese soda that similarly sold terribly.

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