Basically everything that happens to Red Hulk as a result of his arrogance.
At the very end of the episode, we see that A-Bomb brought the Devil Dinosaur back home as a pet.
Made even funnier when She-Hulk informs A-Bomb that his pet recently left "souvenirs" in Red Hulk's bunk.
Incredible Shrinking Hulks
Red getting shrunk twice due to his recklessness. The second time around, he gains a very high-pitched voice.
To add further insult to injury, when Vista Verde's minigolf course is rebuilt, Red's likeness is imprinted on a golf ball while the remaining Hulks are given statues around each hole.
Hulks on Ice
Hulk and Red's constant bickering this episode is most definitely not funny. A-Bomb's increasing exasperation at having to play intermediary between them and trying to get them to get over it, on the other hand...
Red Hulk gets hotter as he gets angrier. So to make him a better weapon against the ice giant, Hulk and Thor beat him up. When he's furious and glowing red-hot, they throw him at the giant.
Red Hulk: [sailing through the air]: "I HATE YOUUUU!!"
At the beginning of the episode, we see Devil Dinosaur dragging Red in his bed out into the middle of the desert before knocking him into a hole and burying him! Made even funnier when we find out that this is something he does every single day!
The icing on that cake? When Red returns to confront Devil, Devil starts chewing on a treat ala Bugs Bunny.
Red's efforts to find Devil a new home.
While captured and held prisoner by Doom, Doom tells Red that he plans on syphoning the gamma radiation before absorbing it so he wont "turn into a monster". Red drops this:
"Oh right, cause your not a monster."
Galactus Goes Green
Skarr of all people in a Yellow suit and top hat leaning on a cane, looks like the manners lessons did stick.
The Trouble with Machines
This little exchange from A-Bomb and Nick Fury about televising classified information to a live audience.
A-Bomb: "Hey Fury! How about a few nice words about our world-saving shenanigans?"
Nick Fury: You want credit?! A-Bomb, this never happened. The whole event is top secret.
The Smashers(Minus the Hulk) turning the base upside down in search of a cricket. Which turns out to be Hulks distress signal being covered by Ricks funny sound effects machine.
Hulk actually lets out a scream/yell when he sees Obnoxio the Clown.
Spidey, I Blew Up the Dinosaur
Everything, but particularly the fact that they keep treating the super-sized Devil Dinosaur like an unruly dog. A ten-story-tall, razor-toothed, pissed-off unruly dog.
When Spider-Man isn't being the Butt-Monkey, it's Skaar's turn by way of getting stepped on.
Red Hulk's "dramatization" of the Hulk's Origin Story... as portrayed by crude, child-like drawings on lined notebook paper and stilted dialog. (And yet, somehow, Bruce and Rick have their proper voices)
The Tale of Hercules
When Herc was a baby, he strangled two vipers... and already had a full beard!
Days of Future Smash
In the timeline ruled by dinosaurs, Red Hulk points to a dinosaur he particularly hates right before said dinosaur is revealed to be his counterpart.
In a Bad Future where the Leader has a son, Hulk does not want to think about who "Mrs. Leader" is.