* Amarao's eyebrows are scanned seaweed.
* In the original version, the voice actor of Naota's cat (Miyu Miyu) is credited as "?". Creator/HideakiAnno himself provided the cat's voice.
** Given some wonderful {{Lampshading}} in the series itself, when Naota's talking about the school play:
--->'''Naota:''' All I play is a cat.
* The enormous "animated" hand in Ep 5 is actually a digitally altered video of the director's hand.
* AdoredByTheNetwork: Creator/AdultSwim has stated numerous times that of all the anime the network has ever aired, it considers ''FLCL'' as its favorite.
* AnimeFirst: The series was later adapted into a two-volume manga, which was less comedic and even more of a MindScrew than the original series. An omnibus edition of the manga was released in 2012, featuring an additional story and lots of artwork and character designs.
* ColbertBump: Music/ThePillows. Oh, so much...
* HeyItsThatVoice:
** In Japanese:
*** Haruko is [[Manga/KareKano Tsubasa]].
** In tree English dub, there are several examples that range from the obvious to the obscure. For instance:
*** [[http://www.imdb.com/name/nm0329361/ Barbara Goodson]] as Naota
*** Creator/SteveBlum as Miyu Miyu/Masashi (credited as David Lucas)
*** R. Martin Klein as Saku
*** Creator/StephanieSheh as Mamimi Samejima
*** Creator/KariWahlgren as Haruko Haruhara
*** Creator/MelissaFahn as Eri Ninamori
* KeepCirculatingTheTapes: Not the case anymore, but the show fell into this in North America for a few years due to a combination of its continuing popularity and the licensor (Synch-Point) folding not long after releasing a [[UpdatedRerelease complete boxset with additional extras]]. In the months before Funimation rescued the license, copies of the original [=DVDs=] (to say nothing of the boxset) were going on {{eBay}} for ridiculously high prices.
* NetworkToTheRescue: Synch-Point went out of business, and for years, there were no [=DVDs=] after the initial print run of the box set. Luckily, Creator/{{Funimation}} decided to re-release the series on a single DVD and give it its first ever (American) BluRay release. Similarly, after Creator/{{Tokyopop}} shut down its American division, Creator/DarkHorseComics released an omnibus edition of the manga.
* PortmanteauSeriesNickname
* StarMakingRole: Haruko Haruhara for Creator/KariWahlgren.
* WhatCouldHaveBeen: Creator/AdultSwim [[http://toonami.tumblr.com/post/40676079770/so-since-toonami-and-adult-swim-were-responsible-for tried to have a second season made]], kinda like what they did with ''Anime/TheBigO''.

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