The scene at the very beginning when Carl meets Ellie, and she encourages him to get his balloon.
Especially the board suddenly cracking out from underneath Carl. Admit it — you laughed. And if not, the Ambulance Cut immediately after likely sealed the deal.
Also, when he hits himself in the face with his cast and his girlish scream when shocked at seeing Ellie come through his window.
Not to mention the scene where Carl is pretending to be Charles Muntz.
Announcer: He hurdles Pikes Peak! (Carl jumps over a rock) He hurdles the Grand Canyon! (Carl jumps over a crack) He hurdles Mt. Everest! (Carl tries to jump over a tree stump, but fails) He goes around Mt. Everest!
In the past, the child Ellie sees a puppy out her window and says, "I will bring it back for SCIENCE."
Ellie's summation of where she wants to go:
Ellie: South America! It's like America... but south!
Ellie to Carl: "Y'know, you don't talk very much... I like you!"
Carl and Ellie's wedding. We first see the bride's half of the room going absolutely bugnuts, clapping and hollering and jumping around and even firing off shotguns. Then we see the groom's half, which is stone cold silent and expressionless (except for stoic clapping).
Even funnier is that Ellie's family are dressed in bright clothes, while Carl's family are damn near dressed for a funeral.
When Carl goes through his morning routine and goes outside and we see all the construction around that one little patch of home.
Every time the leafblower is used.
"I believe I made my position to your boss clear."
Worker: You, uh, poured prune juice into his gas tank.
Carl:(chuckling) Yeah, that was a good one...
When Carl speaks his mind to the building contractor in classic old guy fashion:
Carl: You in the suit! Yes, you! Take a bath, hippie!
Carl sending Russell out on a Snipe Huntand when he actually finds a snipe.
After Carl has sent his house into the air, he sits back and prepares for a rest when the door knocks. Startled, and more than a little bewildered considering he's miles in the air, he opens the door and finds Russell on the front porch, holding on for dear life. The fact he and the camera do a Double Take is just gravy:
Russel: Hi, Mr. Fredrickson! Carl: What're you doing out here, kid?! Russell: I found the snipe, and I followed it under your porch. But this snipe had a long tail and looked more like a large mouse... (The wind rips a pennant off Russell's pack and it flies off) Russel:(utterly terrified) Please let me in. Carl:(Beat) ...No. (Slams door)
Carl's Daydream Surprise, figuring how he'll get rid of Russell. Namely, he imagines lowering him down with a Bedsheet Ladder. And dropping him.
Carl:(back from the Imagine Spot and in disappointed deadpan) Well, that's not gonna work.
The look of horror on his face when his imaginary self drops Russell, his Futile Hand Reach and Russell's brief scream add to the sheer macabre hilarity.
One can only imagine the reaction of first-time viewers, because the Imagine Spot is so seamless and probable, for a moment they probably did believe Carl blundered Russell to his doom.
After Carl turns his hearing aid off, watch that scene with captions or subtitles on. Either that, or listen close enough:
Russell: There's a storm coming. It's starting to get scary. We're gonna get blown to bits! We're in big trouble!
The way Russell says, "I thought you were dead!"
Russell: With my Explorer GPS, we'll never be lost! (Accidentally tosses the GPS out the window while gesticulating)... Oops..
Made even funnier when Carl doesn't have a clue what a GPS is, being a standard technology blind elder. If you look closely, the house doesn't have anything more modern than the TV, and even that looks like it was made in the 70's at the latest. This gets a Call-Back in the credits where Russel is trying to teach Carl how to use a computer and Carl stares in befuddlement at the mouse.
Another credits gag is a photo of Russel holding up a GPS tracker. Either he got a new one, or they found the original one!
Carl barely stops the house from floating out beyond a cliff and he is stretched out over the drop himself. His blood-curled yell is exactly how one would react.
Carl instructing Russell that they will "walk to the falls quickly and quietly with no rap music or flashdancing" as Russell trails behind, "Uhhuh...sand...I FOUND SAND!"
Russell has a typical little-kid-on-a-long trip moment while he and Carl are "walking" Carl's house to Paradise Falls:
Russell: I'm tired! And my knee hurts! Carl: Oh yeah? Which knee? Russell:(Beat) My elbow hurts!
And after Carl just grumbles at him and decides to continue on when a moaning Russell collapses out of boredom, he starts dragging Russell along like he's literal dead weight.
When Carl tries to shoo Kevin away, Kevin instead mocks him, to the point of even copying how Carl is moving.
Carl: Shoo! Shoo! Get out here! Kevin:(copying Carl) Bwabwabwabwa! Carl: Go on! Beat it! Kevin:(still copying Carl) Bwabwabwabwa! Carl:(frustrated) Aaagh! Kevin:(still copying Carl again) Bwaagh!
Dug's first appearance:
Dug: I can smell you!
Carl:...What? You can... smell us..?
Dug:...I can smell you!
And before that, when they realize that what they thought was a person was actually a rock Russell says, 'Heh, you were talking to a rock, Mr. Fredricksen.' You can just see him thinking, 'But the rock was answering!'
This moment when Carl and Russel first meet Dug:
Russell: Sit! (Dug sits) Hey, he's trained! Shake. (Dug shakes) Speak! Dug:Hi there! (Carl and Russell gasp) Carl: ...Did that dog just say "Hi there"?
In which Pixar captures the very essence of 'dog' in a single line of dialogue:
Dug: My name is Dug. I have just met you, and I love you.
Mr. Fredricksen yells at Dug, "Learn to bark like a real dog!"
Dug: I can bark! (Barks in front of Kevin) And here's howling. (Howls until Kevin squawks at him to stop)
Carl decides the best thing to do about Dug is just keep walking. Russell points out, "But it's a talking dog!"
And Russell's comment that he likes the old one better when Muntz fixes the collar back to its normal Evil Sounds Deep version.
Beta trying to be diplomatic and telling Alpha his collar sounds broken before Gamma just shouts, "Your voice sounds funny!"
When Alpha calls Dug, Dug starts the conversation by saying Alpha's voice sounds funny. The way Alpha snarls "I know! I know!" with his lips curling back and his teeth showing is absolutely hysterical.
The looks on the dogs faces when they worry Muntz won't give them a treat if they lose Dug.
Dug saying, "Will you be my prisoner?" to Kevin.
What really sells it is when Dug is holding onto Kevin's leg like a beggar and Kevin continues dragging Dug along. And Dug has a huge smile on his face the whole time. "OH PLEASE PLEASE PLEASE BE MY PRISONER!"
When Carl tries to get Dug and Kevin to leave him alone and he points at them with his walker: (Points to Dug) I don't want you here. (Points to Kevin) And I don't want you here. (Kevin squawks at him in indignation while he points to Russell) And I'm stuck with you.
Dug isn't listening; he's transfixed on the tennis balls on Carl's walker.
Carl's attempt to get rid of Kevin and Dug. He's run a considerable distance whilst dragging Russell behind him and when he thinks he's in the clear, sits down for a rest. Then he turns around and is greeted by;
Dug: Hi, master! Carl: ...Afternoon. (Dug spits it out the ball onto Carl's hand, still covered in drool. Carl then turns the other way, and Kevin is also back.)
This exchange:
Russell: Can I tell you a secret?
Carl: No.
Russell: Okay, here it goes.
The "WTF?!" face of the frog after a sleep-drunk Carl hits it upon waking up, a la alarm clock. When it hops off, you can almost see it thinking "Well, I never!"
Dug exclaiming, "Point!!!!" when he's pointing.
When Mr. Fredricksen says to Kevin, "Hey, get off of my roof!", Dug replies, "Yeah, get off of his RUFF!"
Russell's reaction to finding out Kevin is not a Kevin at all...
Dug gets put into a cone collar as a punishment and quietly remarks, "I do not like the Cone of Shame."
When Carl realizes Muntz has gone way off the deep end, he glances through the window and see's the target of the crazed explorer; Kevin! He snaps his attention back around and tries to casually leave, and as Muntz advances, Kevin picks the perfect making to vocalize to her chips. Carl's slow cringing sells it as he realizes the jig is up.
Muntz makes the mistake of saying having guests is a real treat, making his dogs go nuts.
Muntz: (Muttering) I should never use that word.
What the dogs were saying when Muntz invited them into his airship.
Dog: I like you temporarily!
Dug tries to stop the dogs chasing Carl, Russell, and Kevin.
Dug: Stop you dogs!
(Dogs ignore him and run past)
When all those dogs went over the cliff like lemmings. Don't worry they got better.
Pay close attention, one of them is cheating. He has an ace tucked in his collar. This is a Shout-Out to the original painting◊ by Cassius Coolidge ("A Friend in Need") where one dog is passing an ace under the table.
Gamma referring to Russell as a "small mailman."
And later the Brick Joke when Russell is captured by Muntz's dogs and tied to a chair:
Beta:(smugly, to Russell) Scream all you want, small mailman! Gamma: None of your mailman friends can help you now.
There are only two lines in the movie spoken by a dog that aren't a Funny Moment, and both of them are spoken by Alpha. Everything else is hilarious, even the Tear Jerkers and Heartwarming Moments. Especially those.
"Who wants the ball?" Specifically, the protagonists distract Alpha's hench-dogs by throwing a ball to them.
Special mention goes to the moment when Muntz has Carl pinned down and tauntingly asks if he has any last words. He urges Carl to "spit it out", and so Carl obliges— spitting out his dentures right in Muntz's face.
Dog:(gasps) He wears the Cone of Shame! Alpha:(in chipmunk voice) Huh? What?! Do not just continue sitting! ATTACK! (The dogs all start laughing at him) Alpha: NO! NO! STOP YOUR LAUGHING! GET THIS OFF OF ME!! Dug: Listen, you dog. SIT! (Alpha sits, as does the rest of the pack) Dogs: Yes, Alpha! Dug: Alpha? I am not Alpha. He is-Oh!
It's the way Dug's ears perk up once it dawns on him that sells it.
To top it off, if you pay attention, Alpha is still wearing the Cone during Russell's ceremony.
The running gag of dogs shouting, "SQUIRREL!". Eventually, it causes the planes to crash!
Gains a Call-Back at the end when one of her babies does the same thing to Dug.
Kevin choking up Carl's cane, followed by her babies choking up the feet/balls of his cane. At this point Carl cheerfully gives up the cane for lost, and lets Kevin keep it. Sure enough, he no longer uses a cane after this.
Doubles as a Heartwarming Moment. She'd adopted the whole swallow-and-regurgitate-the-cane routine as a friendship ritual to Carl, and then taught the same thing to her chicks!
The car-counting game at the end.
Russell: Red one! Carl: Blue one! Dug:(who is of course a dog) Grey one!
One of the tracks on the CD is called "Giving Muntz the Bird."
Novelisation
Stuck with an overeager junior ranger, a giant multi-coloured bird and a talking dog, Carl laments that at this point, he expects a giant dancing hippo to join them.
Documentary Series
Everything involving Tony in 7 Up. He's tiny, hyperactive and the epitome of the Cheerful Child trope. Special mention goes to this iconic line:
I wanna be a jockey when I grow up! Yeah, yeah! I wanna be a jockey! I wanna be a jockey!
Paul's response to being asked whether he thinks he'll go to university in 7 Up toes the line between this and a light Tearjerker:
What does university mean?
The Funny Background Event of Suzy's dog chasing down and killing a rabbit before giving it to her as a present in Seven Plus 7. Suzy's response? Not Again!
Charles making faces while John talks about his disdain for Brits who choose to leave the country in 21 Up. In general, the fact that Charles has become rebellious and counter culture while his old schoolmate John has become the very picture of posh conservatism.
◊ by Cassius Coolidge ("A Friend in Need") where one dog is passing an ace under the table.
