Maui is telling Moana his story, claiming he stopped the sun with his fish hook, pulled an island from underwater, and fought monsters. This is told through the tattoos on his body, until we see the actual Maui while his tattoo counterpart is dancing. Maui tells the tattoo to stop, and it droops sadly.
Moana's weirded-out look after all of Maui's haka, prompting him to say "What does a demigod have to do?"
Heihei stepping off the boat with a dumb look on his face.
The beginning of the film when Gramma Tala is telling the village children the story of Te Fiti, Maui, and all the monsters out there. When she said "OF INESCAPABLE DEATH!", one child starts crying and another child faints, but baby Moana is fully invested and excited.
Then Moana's dad comes in and tells them not to worry as there are no such things as monsters...and accidentally unrolls a bunch of tapestries depicting horrible monsters that cover the entire hut and thus plunging it into darkness. The children then flip their collective shits.
Kid #1:(while the children are running around in terror) Monsters, monsters!
Kid #2: It's the darkness!
Kid #3: No, no, no, no, no, no!
Tui: There's no monsters, no monsters—
Kid #4: I'm gonna throw up!
Moana tries some pork that a villager offers her. She comments that it's delicious...right in front of an upset little Pua the piglet.
The word "pua" means "pork". She's essentially calling him delicious to his face.
Moana gets an extremely underage admirer trying to flirt with her during her dance class. It's also the only time anybody tries anything romantic with her during the movie.
Moana's incredibly awkward facial expression in response to the kid's behavior makes it even better.
Heihei. So much comedy gold from the stupidest rooster in the world.
Old Man: I'm curious about the chicken eating the rock. [Heihei repeatedly pecks a rock] He seems to lack the basic intelligence required for pretty much...everything. Should we maybe just cook him? Moana: Sometimes our strengths lie beneath the surface. [Heihei swallows the rock, which is bigger than his head.] Far beneath in some cases. But I'm sure there's more to Heihei than meets the eye! [She grins awkwardly. Heihei spits up the rock...only to begin pecking at it again]
Moana:[Removes coconut from Heihei's head then puts it back]Heihei?!?!?
Heihei the stowaway. Looks right, water. Looks left, water. Twitchy Eye. Camera pulls back.
When Moana puts the coconut shell back on his head, Heihei stops screaming. Only to continue when she takes it off, twice, and higher pitched each time.
Within the first few seconds of him being on the boat, he walks directly off and almost drowns, so stupid that he doesn't even try to right himself when he's floating head down, leading Moana to dive in after him.
When they get back to the boat, Heihei almost immediately does the exact same thing. When Moana realizes this, she drops him in the storage compartment for safekeeping. Unfazed, Heihei continues to pace back and forth, bouncing off the edges like some kind of malfunctioning robot.
When the waves start to get rough at night, Moana starts reciting her Survival Mantra. Cut to Heihei sliding from side to side in the storage compartment, still with the same dumb look on his face.
Even better is when even the Ocean has had enough of Heihei falling off the boat and picks him up, stuffs him into a basket, puts the lid on, puts that into the storage compartment of the boat, and then for emphasis slams down the storage cover to make sure it's staying there. It even gives a satisfied "There!" kind of nod afterwards.
And then he still tries to walk into the Ocean at the end of the movie. In response, the Ocean (presumably because it's simply grown tired of the chicken's stupidity) simply picks him up, spins him on his heels, and sends him off in the opposite direction.
Maui gets back into practice with his hook by starting small, shapeshifting into a beetle—which Heihei promptly swallows.
The icing on the cake is how once Maui transforms back to normal, he has an irritated look on his face while Heihei just dumbly hangs off his finger.
Blink and you miss it: When Moana is sailing back for round two with Te Kā and ash starts falling, Heihei eats a piece of ash out of the air.
The AV Club's review summed Heihei up pretty well: not only is he Too Dumb to Live, he's too dumb to die.
Same goes for the Double Toasted review, where Korey Coleman more or less seconds the old man's motion.
Korey: Y'all shouldn't [set him up for CMOFs]. Y'all should just make a Chick-Fil-A sandwich out of him, put him out of his misery.
He also gets a couple moments in the "Where You Are" sequence. The first is when he's in a line of roosters hopping over a taro root with a coconut shell on his head. Moana takes it off so he won't trip, and he does anyway. The second comes when Moana, her mother, and some of the village women are cooking something on coals, and Heihei sits down on them.
Though Grandma Tala's death scene is a sad affair, she tells Moana to "grab him by the ear" when she meets Maui. She does. One problem, however: Maui has Super Strength and isn't fazed in the least.
After getting washed up on Maui's island, Moana gets outright pissed off because the Ocean ignored her pleas during a storm. This is after it "pulls the rug" out from under her foot as she tries to angrily kick the water, sending her flailing to the ground again.
Moana tries to introduce herself to Maui, who keeps interrupting and talking over her. She finally wallops him in the stomach with her oar and grabs him by the ear to make him shut up. It's even funnier because that's exactly what her grandmother told her to do.
During this, Maui assumes she came for an autograph and uses Heihei to sign her oar, telling her, "When you use a bird to write with, it's called 'tweeting.'"
Also, despite the fact that he's been trapped on that island for 1,000 years with no visitors, and Moana's boat clearly washing up there by mere happenstance, Maui's first assumption when he sees her is that she's a fan of his who came looking for an autograph.
Then as Moana begins to recite her speech, Maui interrupts her mid-sentence by tossing her overboard. She is promptly returned. At this point Maui's more annoyed than surprised.
Maui: Aaaand she's back.
Then Maui jerks the boat, causing Moana to topple off. We cut to Maui's satisfied expression...which falls the minute he hears the familiar splash-thud.
Maui: It was Moana, right?
When Moana reveals The Heart of Te Fiti, Maui grabs it and throws it as far as he can. The ocean throws it back into his face. Then Maui tries to leave the boat and the Ocean sticks him back on the boat.
Maui: "OH COME ON!" (Ocean squirts his face with water)
It's then repeated after the Kakamora battle. Moana makes a deal with Maui and he shakes her hand...only to flip her overboard. And the ocean puts her back.
Maui: (a soaking wet Moana glares at him and he shrugs) Worth a shot.
Actual hair logic in a Disney movie, as when Moana whips around to be dramatic, her soaked hair slaps across her face and she has to lift it up to speak.
This little bit as Moana is trying to persuade Maui to join her, which could make him a hero:
When Moana asks if Maui is afraid of The Heart of Te Fiti, Maui denies it. Mini Maui then starts chewing his nails and running around in mock terror. Maui then threatens to make it sleep in his armpit if it doesn't stop.
The Kakamora, as an homage to the War Boys in Mad Max: Fury Road, play their own chase music. This includes strapping themselves to bungee cords and bouncing up and down on a giant drum to produce drumbeat.
When Moana goes on the Kakamora's ship to rescue Heihei, one of them tries to shoot her with a dart. The dart ends up hitting the leader, who turns around and gives the Kakamora the best Death Glare one can muster without any actual facial expression. The Kakamora hides the blowgun behind its back as the leader drops like lead.
Being coconuts with legs, the Kakamora are kind of cute and don't really have faces to move. So they draw their scary faces on with chalk. It's a little like this.◊
When Maui and Moana are arguing, Mini Maui keeps score with Moana in the lead.
He later adds another score to Moana after Maui jumps into Lalotai. Maui is confused...only for Mini Maui to gesture upwards and Moana ends up landing on Maui's face.
Topped by his reaction after she falls screaming into the Realm of Monsters:
The "being the chief's daughter equals princess" bit could be a playful Take That! at the people who ask why Pocahontas is part of the official Disney Princess lineup and Moana's reply about that not counting could be a little Self-Deprecation on Disney's part.
Maui grabs Heihei and gives the camera a cheery grin, saying, "Boat snack!"
Maui:(To Heihei) I am gonna love you...in mah belly!
In a bit of Black Comedy, Maui pretends for a moment that a human sacrifice is needed to enter Lalotai. Moana believes him.
Maui:(laughs) Kidding! So serious!
When Moana asks Maui to teach her to sail, Maui adamantly refuses. The ocean interjects by plucking a Kakamora dart out from the boat and stabbing him in the butt. He's really unimpressed.
Maui: Really? Blow dart in my butt cheek? You are a bad person.
Maui, immobilized with a Kakamora dart, instructs Moana to search for a warm current. She reports the current is cold, then suddenly it gets warmer... because Maui just pulled a Urine Trouble. Moana's reaction is just priceless.
Moana: EWW! That is disgusting! WHAT IS WRONG WITH YOU?!
The giant shit-eating smile on Maui's face just adds to the hilarity.
When Moana and Maui are about to enter Lalotai,
Maui: Don't worry, it's a lot farther down than it looks. CHE-HOOOOOO! (jumps in. Beat) I am still falliiiiiiiiing!
When they're infiltrating Tamatoa's lair, Maui startles Moana by accident and she punches him in the mouth. He looks so shocked and then picks her up by the head, unamused, as she tries to frantically apologize and change the subject.
Moana being sent in to act as bait for Tamatoa.
Moana:(banging on a drum, deadpan) Wow. A shiny, glittery cave. And just like me, it is covered in sparkly treasure. Sparkle, sparkle, sparkle.
And, of course, Maui lampshades the Bad "Bad Acting" and tells Moana she needs to sell it more.
Moanas Large Ham attempt to get Tamatoa to talk about himself.
Moana: Because...we mortals...have heard the tale of the crab...that became A LEGEND!
While plenty intimidating, Tamatoa is hilarious thanks in large part to Jemaine Clement's conversational Kiwinote New Zealand accent.
During the battle with Tamatoa, he claims that Moana can't run from him. She starts to run.
Tamatoa:(somehow simultaneously confused and deadpan) Oh, you can. You keep surprising me.
When Tamatoa first grabs Moana, she keeps looking back and forth between his eye stalks, leading to him getting frustrated while telling her to pick one to focus on.
Tamatoa: What is a human doing here in the Realm of The Mon—just...just pick an eye, babe...I can't...concentrate...on what I'm saying. Just pick one. Pick one!
Moana: (after Tamatoa shows interest in her pendant) NO! That's my grandma's! Tamatoa: (mocking Moana and suddenly growing pretty eyelashes to complete the mockery) "That's my grandma's!" (normal again) I ATE MY GRANDMA! And it took a week because she was absolutely humongous. WHY ARE YOU HERE!?
Speaking of which, Moana even said earlier that Maui and Tamatoa are Not So Different since they both love bragging about themselves... only for Maui to say that they WERE friends until he ripped off Tamatoa's leg. Moana has just enough time to pull an Oh, Crap! before the crab himself shows up.
When "Shiny" starts, we get a reaction shot of Moana making a "WTF" face as if she can't believe he just started singing.
After Tamatoa finds out he's been tricked by Moana, he begins verbally breaking down her clever plan step by step before crushing the decoy Heart of Te Fiti in sudden frustration. Mere typing doesn't do it justice.
Tamatoa:(grabs the "heart", looking at it with glee as theatrical music is swelling) Yes! I have the-wait a minute... (the music halts, and time doesn't seem to move as Tamatoa talks) Augh! Oh, I see. She's taken a barnacle, and she's covered it in bioluminescent algae. As a diversion. (crushes the barnacle and time starts moving again) GRAAHH!
His non-American pronunciation of "algae" (with a hard G) is the icing on the cake.
Tamatoa's reaction after Moana and Maui escape and he's knocked onto his back is to half-heartedly shout "Hey!" two times, then to ask "Did you like thesong?"
Though the beat down Tamatoa gives Maui is definitely sad, there's something darkly humorous about Tamatoa shaking Maui off his hook by strumming him like a guitar.
Similarly, once Tamatoa has Moana in his grasp, he starts using her as a human microphone as he sings.
Maui tries shape-shifting again after re-acquiring his hook. His "Cha-hoo!" causes him to turn into...a small red fish that flops around pathetically on Tamatoa's shell. He gives a face of "Huh, this usually works the first time," so he does his war cry and flops up in the air, rapidly shapeshifting into (in quick succession) a shark, a bug, Sven, a pig, and finally, his normal self.
After barely escaping Tamatoa, Maui tries to have a genuine heartfelt conversation with Moana, who can't concentrate because his shapeshifting messed up, leaving him with a shark head.
After realizing he has a shark head, Hilarity Ensues as Maui tries to turn back into his normal self. At one point, he even winds up morphing into Heihei. Upon seeing who he is, Maui lets out a scream and immediately transforms again.
At one point during this, Maui manages to a get stuck in a half-human, half-shark form again — except this time, he has a shark tail instead, basically turning him into a merman.
Te Kā's facial reaction to seeing Maui in Shark Head form during the final battle.
On the list of facial expressions, the sheer uncomprehending look on Te Kā's face when Maui gets right in her face before turning into a whale has to be seen to be fully appreciated. And then Maui belly-flops into the water, splashing her.
Moana asks Maui what one of his tattoos depicts. He says that it shows some people discovering "Nunya". When asked what "Nunya" means, he replies with "Nunya business".
The unamused look Te Fiti gives Maui after she becomes herself again. It's kind of a mid-way point between "Yeah...no" and "Are you serious right now?" She doesn't even have to say anything for Maui to become nervous.
Maui: Te Fiti![nervous laugh] Hey, I mean... how ya been? Te Fiti:[gives a look that says 'I've been a raging lava monster for a thousand years. How do you think I've been?']
In fact, even after he is rewarded for his efforts, first thing he does after a quick thanks is fly the hell out of there, as if saying "Yeeeah I'mma leave before you change your mind and smite me..."
When Moana tries to hide the fact that she just had set out with a boat into the sea only to nearly drown, her cool grandma reassures her with "Whatever just happened... blame it on the pig." and that it will be their secret with "I'm [Tui's] mother. I don't have to tell him anything!"
Moana finds her grandmother dancing with manta ray in the shallows;
Tala: I want to come back as one of these...or I chose the wrong tattoo. (Turns her back showing a manta ray-shaped drawing) Moana: Why are you acting weird? Tala: I'm the village crazy lady. That's my job.
Moana gives a big explanatory speech to Heihei about her plan to confront Te Kā with just her canoe, and then she stows Heihei away in the storage compartment as she ends it with:
Moana: ...none of which you understand, because you are a chicken.
As they're sailing to Te Fiti after Maui discovers just how out of practice he is with his hook, Maui is lying on the raft, despondently singing his song with different lyrics, "We're dead soon. Hey, it's okay, it's okay, we're dead soon."
When Maui is doing the chant before he opens the entrance to Lalotai, his shouting sounds almost exactly like, "I'm nuts! I'm nuts! I'm nuts!"
At one point during the trip to Maui's island, Moana starts drifting off, only for the ocean to rise up behind her and give her a quick smack on the head, causing her to wake up with a startled "Board my boat!"
The fun doesn't stop there! Tudyk talks about his acting process:
The character youre playing, even though hes a rooster and is really stupid, you approach it in the same way you would approach Hamlet, which is exactly how I approached it. But they give you the circumstances. "Youre on the boat. You didnt expect to be here. You just climbed in a boat to maybe sleep. You dont even know why you climbed in the boat. Youre really that dumb. Every three minutes is a new world to you, so you see that youre trapped on this boat, and you freak out. Go."