In "House of Crime", a clue states that the guy who's kidnapping everyone has a grudge.
Donald: What!? I don't hold a grudge? (everyone looks at him suspiciously) What?
(scene transition; Donald is locked in the elevator)
Donald I WANT A LAWYER!!!
The Running Gag of Donald following an annoyed Goofy shouting "Everybody loves me! I never get mad!".
Another running gag involves Donald getting trampled by a gaggle of Disney characters in several episodes.
In "Donald Wants to Fly", Donald dons a pair of donkey ears because donkeys can't fly. Cue the flying donkey from The Three Caballeros.
King Larry messing around with Horace's controls in "King Larry Swings In".
The crew reminding Donald what happened the last time royalty visited the club.
In "Unplugged Club", Minnie asks Mickey if he wants a time-out in his wheel. Cue the largest hamster wheel you ever saw.
In "The Stolen Cartoons", Minnie suggests Mickey take a drink, followed by Mickey drinking out of a giant pet cage water bottle.
In "Gone Goofy", Mickey asks Donald if he's going to give Goofy a (literal) pink-slip to get him fired, Donald hesitates for a moment before shouting yes.
In "Clarabelle's Big Secret," Chernabog's cameo where he reveals he's afraid of the dark.
In the pilot episode when Donald takes over the House, he keeps trying to rename the place to "House of Duck", only to instead given plaques reading "House of Muck" and "House of Yuck", ending with... "House of Pancakes".
"Rollercoaster Painters" has Mickey and Donald in a paint war while riding the coaster, only for the frantic madness to freeze momentarily to allow Goofy (floating upwards on balloons) to pass them.
In "Pit Crew", Goofy counts down a Long Listof puns about gas, including the gas meter, gas mask, gas valve, gas lamp, gastropod and the "gas-t of honor" (the Mad Hatter).
After Goofy's hat is ruined, he tries on Donald's hat, Mickey's ears and their girlfriends' bows.
Several instances in "Hydro Squirter":
Von Drake's rocketship stuck in a countdown: "...five, four, three, two, two, two, two..."
Von Drake's shower nozzle pouring out ice cubes ("Too cold, too cold, too cold!") and then a stream of fire ("Too hooooot!").
As his shower-turned-teleport-machine sinks into a lake, Von Drake says, "Hey! You're not a sink, you're a tub!"
When Von Drake finds himself on the tracks of a roller coaster: "Oh, would you look at that view? And look at that... (sees coaster train coming his way)ROLLY COASTER?!?!"
The tub's alarm message, with Von Drake's usual rambling
"Step away from the tub, you kooky criminal you! This is not a warning! Well, it actually is a warning, but you know what I mean.
The ending, where Von Drake gets rid of the stuck rocket by transporting it away with the tub. He then gets a call from Mickey about the rocket in his bathtub.
From "Hickory Dickory Mickey:
Goofy: Yfoog s'ti. Yekcim olleh.
Mickey: Goofy, you're talking in the wrong end of the phone again!
In the Goofy's Extreme Sports segment about rock climbing, Goofy is performing various poses and techniques, including.