Didn't we have some fun, though? Remember when the platform was sliding into the fire pit and I was like "goodbye" and you were like "NO WAY!" and I then I was all "we pretended we were going to murder you"? That was great...
In Hidamari Sketch, the girls visit a water park and go down a very high waterslide. Yuno screams the loudest of the four girls, and seems genuinely terrified as she goes down, but when she comes up out of the water, she's all smiles. "It wasn't as scary as I thought!"
Helen goes on a wild ride with Sonic in Episode 14 of Sonic X that takes them to and across an island in the middle of a lake where Helen says there is a beautiful patch of white flowers. The two are being chased by government troopers trying to catch them and bring them to the President's annual party honoring Sonic's heroics against Dr. Eggman, and with Sonic's speed and attitude and all that, damn, he and Helen have never had this much fun together in a long time.
Pudding: "Let's do that again!" Ichigo: "One ride per customer!"
In Action Comics #1, the very first appearance of Superman, Supes wants to question a corrupt minion's lobbyist and he obviously won't cooperate. To change his mind, Supes grabs his foot and gives him a terrifying run on power lines and super leaping around the city. Upon landing, Supes says "Wasn't that fun? Let's do it again!" At that, the crook begins to sing.
This happens mid-chase in the Sin City comic "A Dame to Kill For". Dwight McCarthy has just been betrayed, is bleeding to death, is being chased by cops, and has Marv behind the wheel of the getaway car. The entire situation is harrowing for him to say the least but Marv quips how fun the situation is.
In Ice Age, after the animals all go hurtling through an Ice Helter Skelter and slam into a wall, Diego punches the air and asks who wants to go do it again. Diego is under normal circumstances the Deadpan Snarker of the group... but he's not being sarcastic.
Also in the third movie, when the herd is leaving the underground world, Buck states that they should have that adventure full of mortal peril again.
In DuckTales the Movie: Treasure of the Lost Lamp, Scrooge and company take a wild ride down a raging underground river under a wicker basket in order to get out of the treasure trove of Collie-Baba. Once it's all over, Louie says "I wouldn't mind doing that again, now that I know you can live through it."
The Incredibles: After dropping from a cruising altitude, landing on a crowded interstate, taking out half a dozen other cars, somersaulting down the road, and stopping in a vacant parking spot...
Mr. Incredible: Everyone okay back there? Violet: (dizzy) Super-duper, dad! Dash: Let's do that again!
Up: After the house goes plummeting off the blimp, Carl looks over the edge to see Russell swinging from the other end of the garden hose he's holding, barely escaping falling to an inevitable, painful death.
Russell: "That was COOL!"
In The Brave Little Toaster, Kirby throws out a sarcastic quip as the entire party is sinking helplessly into a mud puddle, with him being the first to go.
Kirby: "Oh, this is great fun! Let's make these outings a regular thing, OK?"
In Shrek, after Donkey and Shrek hear the Duloc greeting song for the first time and have their photo taken by the booth, they both gape in bewilderment. Then Donkey says "Wow...let's do that again!" but Shrek stops him.
Finding Nemo: After undergoing a terrifying roller-coaster like exit from the East Australian Current, Marlin surprises himself by gasping "That was... fun!. I enjoyed that."
The first An American Tail sequel, Fievel Goes West, there's a bit where the Mouskowitz family ends up riding the fierce currents of a New York sewer. After the ride ends:
Fievel: Let's go on that ride again!
Mama: Where did I get such a son?
How to Train Your Dragon: During Astrid's first flight with Hiccup (after she apologizes to Toothless and he stops trying to throw her), she says, "I admit it, this is pretty cool."
In Shirley Temple vehicle Bright Eyes, Shirley and her pilot godfather have to bail out of his plane together. They parachute down to a bluff and are nearly pulled off a cliff by the wind until the pilot cuts the parachute loose. Shirley asks if they can do it again.
In Ghostbusters, after demolishing an entire ballroom to catch their first ghost, Ray Stantz remarks, "That wasn't such a chore, now was it?"
It happens in Romancing the Stone, when Jack faceplanted between Joan's legs after a mudslide. Jack has been acting like a Jerk Ass up to that moment, but the excitement of the fall makes him lighten up.
Jack: "Woo hoo! What a ride!"
The climax of Star Trek VI, with General Chang's Bird-of-Prey blasting away at the helpless Enterprise has this gem after yet another Screen Shake:
McCoy: "Well, this is fun."
Galaxy Quest: The friendly aliens' method of transporting the protagonists to their ship can be described roughly as "fly them into orbit at insane speed with nothing but a huge blob of jello to shield them". Everyone looks thoroughly traumatised and nauseated by this experience, except for the engineer... who just remarks "That was a hell of a thing."
From The Hangover: Alan says a variation of this ("That was awesome!") after he almost navigates them into a semi truck on the freeway while they're driving to Vegas.
Doug: That was NOT awesome, what is wrong with you?!
Rose: "I never dreamed that any mere physical experience could be so stimulating!"
In 127 Hours, Aron scares the hell out of Kristen and Megan by dropping suddenly into a crevasse and plummeting out of sight. He lands far below in an underground pool and, after convincing them to jump too, they climb out and dive back in several times, even filming themselves.
In Master and Commander: The Far Side of the World, Captain Aubrey grins and says "now tell me that wasn't fun" after retrieving a sailor from the sea. Note that the sailor had just been assigned to rig up a decoy for a terrifying French frigate to shoot at, allowing the Surprise to escape.
Ruby Rhod proclaims the attack of Fhloston Paradise as the "best show I ever did."
Rizzo: I just fell down the chimney and landed on a flaming hot goose! Gonzo (wistfully): You have all the fun.
Later, after falling off a window ledge into snow...
Rizzo:I suppose you enjoyed that?!?!? Gonzo (matter-of-fact): 'Course!
The Rocketeer: After his first error-filled flight with the jetpack, which ended with a crash-landing in a lake, Cliff simply says "I like it!" when Peevey finds him.
In Thor: The Dark World, after Jane Foster goes through the Bifröst for the first time, she quips, "We have to do that again!"
Played straight and subverted in one Animorphs story. Marco, Tobias and Ax go sliding down several stories worth of staircase bannister in cockroach form on their bellies at warp speed. When they get off, they exult in how awesome it was... just before agreeing to never, ever do that again. Also, Marco is fond of saying things like this.
In Barry Hughart's The Story Of The Stone (sequel to Bridge of Birds), four characters go over an improbably long series of rocks and other nearly-lethal water hazards while escaping from enemies via a river. The narrator (known as "Number Ten Ox") and the story's sensible heroine are forced to sit on the Old Master ("Master Li Kao") and the ridiculously oversexed sound-master Moon Boy until they stop demanding to go back and shoot the rapids again.
In the third book, Eight Skilled Gentlemen, Master Li Kao has apparently learned his lesson; after shooting through yet another series of water-filling tunnels, Master Li simply looks at them wistfully and comments that the man who could re-create that experience would make a fortune.
In Rebel Strike, the Wraiths and three Jedi have to infiltrate Coruscant by sort of parasailing down into the atmosphere, in things which aren't even big enough to be called drop capsules. On the way down, Luke controls nervousness, confers with his wife, and monitors the emotional state of the third, younger Jedi, Tahiri. He worries that he'll have to comfort her when they're down; it's bad enough for him, how much worse for her? Of course, when they do land she's absolutely thrilled, saying that she wants to do it again.
Icecarls in The Seventh Tower enjoy joking about going back and facing dangerous circumstances again. They're so deadpan about it that Tal freaks out, until Milla doubles over laughing at his expression.
In the Sherlock episode The Great Game, a psychopathic criminal is strapping people to bombs and giving the titular hero puzzles which he must solve in order to save them. Sherlock finds this genuinely interesting.
Sherlock: I am on fire!
Turned into a Running Gag on Dinosaurs. Whenever Baby endured any kind of physical punishment, ranging from being hit to being thrown across the room, and one time, even falling out of a tree, one of the first words out of his mouth was an enthusiastic, "Again!"
Big Bird: Oscar, are you all right? Oscar: All right? Let's go back and do it again!
Bones: Brennan tends to throw herself fully into any assignments that involve her and Booth going undercover as "Roxy" and "Tony". Notably in "Double Trouble in the Panhandle", she thoroughly enjoyed playing Booth's assistant in a knife-throwing act, and even tried walking a tightrope at one point. She made it halfway across before falling off the rope and landing on the net, which triggered a Eureka Moment in which she realized how the victims, a pair of conjoined twins, died.
Baby Blues: More than once this trope was the final panel, after Hammie got himself into trouble, and back out of it with the help of Wanda or Darryl. One strip had him falling off of the backrest of a chair he was trying to reach the candy at the top of the fridge from, and after Wanda caught him he cheerfully cried, "Again!"
In Once Upon a Mattress, at the end of the Spanish Panic, all the dancers but Winnifred have collapsed:
Queen: "Are you feeling a little weary, dear?" Winnifred: "No, let's do it again!"
Subverted in Max Payne 2. After getting rid of dozens of mobsters trying to kill Vinnie Gognitti and finally escaping, Vinnie comments "Well, that was fun — in a fuckin' terrible, sick, not-at-all-fun way".
Max of Sam & Max loves this trope; the lagomorph thinks physical abuse is a form of affection. In Hit the Road, fresh from the "Cone of Tragedy" ride that has given Sam a cardiac arrest:
Max: "Ooh, I feel tragically empty."
Sam: "Me too. It's as though an integral part of my essence has been ripped from my being."
Max: "Let's do it again!"
Sam: "Maybe later, chum."
Charmy in Bullet Station in Sonic Heroes after being shot out of a cannon:
Charmy: "That was awesome! Can we do it again?"
Vector: "Charmy.. This isn't a roller-coster ride!
Girl Genius features this after Agatha, Gil, and Tarvek try revivification.
Lampshaded in the original Transformers cartoon episode "Fire on the Mountain", after Brawn and Windcharger have just survived a harrowing attack by the Decepticons.
Brawn: "Retreat? And miss all this fun?"
Windcharger: "Remind me to talk about your definition of 'fun' some time."
In the 2009 The Strawberry Shortcake Movie: Sky's the Limit!, the girls survive a crazy ride down a hill on a leaf (an attempt to catch up with their friend), and Blueberry Muffin, who had been opposed to riding the leaf in the first place, is the first to admit how much fun it was.
Happens in an early episode of The Simpsons, when the family goes to Itchy and Scratchy Land. After a rather deadly roller-coaster that ended in the family jumping out of the way of a buzz saw onto mattresses, Bart and Lisa title-drop the trope.
Quipped by Carl in an episode of Aqua Teen Hunger Force after returning from another dimension with gigantic hands.
Carl: Well, that was fun. I'm gonna take a nap now, and then I think I'm gonna call, uh, some hospitals.
Uttered by Phyllis Diller after going down a trap door chute in a haunted castle in her episode of The New Scooby-Doo Movies: "Wasn't that F-U-U-N, fun?"
In the Batman: The Animated Series episode "The Man Who Killed Batman", while Batman is presumed dead, the Joker holds a "funeral" for him, which ends with Joker tossing the man whom everyone believes killed Batman into the coffin and lowering the coffin into an acid pit while Harley Quinn plays "Amazing Grace" on kazoo. After the coffin disappears into the acid, Joker waits a beat and asks, "Well, that was fun, who's up for Chinese?"
In an episode of Zigby, Zigby and his friends McMeer & Bernie explore a cave. They end up sliding right out of it and hit the ground hard. Bernie says that she thinks she's broken her feathers. Zigby (a zebra), says that he thinks his stripes are jumbled up. "Let's do that again!" comments McMeer.
In "Buster's Bath," a story from My Friends Tigger & Pooh, when the group can't convince Buster to take a bath, they decide to try hosing him down. This results in a madcap scenario in which the water builds up because Eeyore is sitting on the hose, then when it all gets released, Piglet goes up in the air with the hose and it sprays around wildly. At the end of the whole thing, Roo exclaims "Let's do that again!"
Animaniacs: Wakko in "Ups and Downs", after the maintenance men raise the elevator he and Dr Scratchansniff are trapped in and drop it really quick:
"Wasn't that neat?"
In one episode of Fantastic Four: World's Greatest Heroes, Dr Doom sends the Baxter Building into space. Reed has to fly it like a spaceship, using Doombots as thrusters, before crashing it into the Latverian Embasssy. Most of the building's residents are terrified by all this, but one dotty old lady wants to do it again.
The season 2 finale of The Venture Bros. After fighting off dangerous Guild helicopters, having the X-1 crash into The Cocoon, and the whole lot of them winding up crashed in the Grand Canyon, Brock plucks Hank out of the water. The first thing Hank says?
Hank: Again! Again!
Teen Titans: One episode of Teen Titans has Raven forced to take three little kids who are potential superheroes to a safe place to stop them from being kidnapped by the Brotherhood of Evil. At one point, she and the kids are trying to escape from Monsieur Mallah by riding in a cable-car, and the wire snaps. They go plummeting down the mountain in the car, which eventually crashes, but the kids land harmlessly in the snow. The two who can talk both promptly sit up and scream, "Again! Again!" Raven's reply? "NO AGAIN."
The chase scene in the Egghead cartoon "Johnny Smith and Poker Huntas" is interrupted when the Indians stop their cars and the chief says "Hey, guys...isn't this fun?" The others chime in "Yeah! Let's do it some more!" And the chase resumes.
The New Scooby-Doo Movies episode "The Frickert Fracas" has Shaggy hung up on a grist mill's paddlewheel and constantly getting dunked in the river as a result. Scooby tries to help by grabbing his legs, but he winds up in the same boat. When Vernon (Maude Frickert's farmhand) finally helps them out, Jonathan Winters comments:
Jonathan Winters: Hey, that looked like fun! I'd try it myself except for this sprain in my pinky.
Shaggy: (to Scooby) Fun?! Did you think that was fun???!