Katara: It's a random stranger that I can exhibit naive optimism towards! Yay, naive optimism! Aang: Uh... who are you? Katara: An optimist! Sokka: And I'm a skeptic! Skepticism, skepticism, skepticism... ... Katara: Hopeful optimism? Sokka:Continued skepticism.... — Characterization, Cliff Notes style.
Much of the series is Author Avatar for GanXingba to point out plot holes and other logical inconsistencies. The comet conversation between Aang and Avatar Roku, for example.
Jet: You're too late to stop me. Aang: Please. I'm the Avatar. You can't even bend! You don't stand a- (crashes into tree with a loud thud) Okay, seriously, what the crap? Who wrote this episode? It was Zuko.
Sokka: Well Aang, because when I'm being pursued by people who want to kill me, I'd rather throw them off by walking through a dense forest than fly through an empty sky on a giant freaking bison!
Katara: That may make sense, but since you're trying to be the leader, I'm guessing this is gonna fail horribly.
Zuko: I don't think rabbits can operate screwdrivers without opposable thumbs.
Conspiracy Theorist: Jet, with his "crazed theories" about the Freemasons and Illuminati. In fact Viacom deleted this episode because Jet knew too much of the truth.
Cut-and-Paste Translation: Will rearrange the order of episodes, paste two (or more) episodes as one, and radically alter some plots instead of just abridging them. But this is likely more for Rule of Funny than anything else. And a bit of Fridge Brilliance when you realise why the Blue Spirit's first scene comes before Zuko's first scene in ep. 8.
"Now that we can conveniently move, I have a convenient plan that conveniently involves these convenient vats of perfume they conveniently make at this temple!"
"How convenient!"
Does Not Understand Innuendo: On the Zuzu's Date episode, his date tries every innuendo short of saying that she wants to have sex with him, failing to get across her meaning to Zuko. In the end, she flat out says that she wants to have sex with him, and instantly, Zuko is transformed from whiny bitch to lady's man extraordinaire.
For Science!: Complete with Trumpet Music, and that makes everything okay.
Funny Background Event: In Episode 6, when the kids are cheering for Jet's speech, you can hear someone say 'sieg heil' among the cheers. May also double as Crosses the Line Twice.
Sokka: Now sis, remember what we said about Waterbending when you're PMSing...
In a commentary of episode one, the creator of the series explicitly stated that that joke is the one that he's gotten the most criticism for and admits that it wasn't a very good idea anyway.
Sokka:Let me get this straight: you can invent tanks (invented 1915), jet skis (invented 1973), and a gi-gantic friggin' drill (invented 20XX)... but the concept of a hot air balloon(invented 1783)... eluuuuudes you. ...I hate this world and everyone in it.
And Jet's obsession with shoelaces alludes to one of the Question's best known lines. "The tips of shoelaces are called aglets - their true purpose is sinister."
Colonel Avdol: "Admiral Zhao... I have leaned over a great deal of time the only to defeat the Northern Water Tribe... is to burn it."
Which in itself calls back a similar shout-out in Antfish's own series where Abdul has an Imagine Spot where he is crowned as "Fire Lord Abdul," and when he's snapped out of it, he screams "I WILL DESTROY THE AVATAR!" Aang, voiced by Gangxingba, pops in and adds his disapproval of this plan.
Side Effects Include...: The side effects for Haru's Sexyfine Shampoo are as follows: "Headaches, blood clots, green rashes, gonorrhea, albinism, thumb cancer, chocolate cravings, heroin addiction, pregnancy, ear mutation, increased risk of cyborg koala attack, the apocalypse, and Zutara." Your Millage May Vary if that last one is a case of Arson, Murder, and Jaywalking or not.
Strange Minds Think Alike: In the first episode, Sokka, Aang and Zuko all mention the "iceberg pinata" explanation for a Human Popsicle. Later, we learn that Aang and Zuko are both amazingly obsessed with eating Lucky Charms for breakfast.
Tempting Fate: "Wow, what a normal and uneventful day we're having, surely nothing exciting and life-changing could hap- "
Took a Level in Badass: Aang can effortlessly own anyone, provided he's not being written by Zuko.
Katara in episode 11.
Trash Talk: Aang loses it when a glider pilot "does the ancient Airbender equivalent of You Got Served."
Aang: So you think you're hot shit, huh, but I got news for yo' punk ass! You ain't got nothin'! Ho ho, what is this, loop-de-loops? Get that J.V. shit outta here, son!
The Guy Aang's trashing? Teo. Sokka treats it as a What the Hell, Hero? after the reveal.
What Kind of Lame Power Is Heart, Anyway?: When Aang states that he's master of all the elements, the four main elements' symbols are shown around him. A heart symbol then suddenly appears but is quickly X'd out.
What the Hell, Hero?: Aang gets the recieving end of this for laughs in episodes 9 with the map (Then they wouldn't be paying attention to ME!!) and in episode 10 with Aang trash-talking Teo (you remember, the kid in the wheelchair.)