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!".
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.
MouseWorks shorts
"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 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.