Just the fact that after the elaborate musical number to repaint the car, the scheme fails literally seconds later. (Although hiding in front of that psychedelic billboard was at least useful)
Doc Hopper: Max, find me a frog and a bear in a tan Studebaker! Max: Gee, Doc, all I see is a frog and a bear in a rainbow-colored Studebaker. (Beat) Doc and Max:WHAT??? Kermit and Fozzie:WHAT??? Kermit: Fozzie, they're right behind us! How did they recognize us? Fozzie: Well, they recognized you. Kermit: What do you mean? Fozzie: (dismissively) There's a hundred bears around.
Prof. Krassman: Say good-bye to the frog, Pig. Miss Piggy: Why should I? Prof. Krassman: Because in 10 seconds, he won't know you from Kosher Bacon! Miss Piggy: THAT DOES IT!(Miss Piggy beatdown commences.)
After they're rescued from their torture, Piggy and Kermit embrace for a romantic moment...before Piggy takes a call from her agent and books a commercial gig, walking out without saying another word to Kermit. Her muttering over the phone is really what makes the gag.
Kermit: Hello? (Beat) Uh, Piggy, it's your agent. Piggy (sweetly): Thank you! (gruff sotto voice) Yea Morty what you got? (Beat) Commercial? (Beat) How much? Mmhmm. When? (Beat) Take it. (Hangs up, turns to Kermit) Um...bye!
Animal helping Bunsen test the sound equipment during the interlude of "The Magic Store":
Culminating at the church where the Electric Mayhem are, with a sign that says "Lost? Have you tried Rev. Harry Krishna?"
Another Running Gag/Chekhov's Gag involving the introduction of Sweetums. Originally the "jack" for "Mad Man" Mooney, he starts chasing Kermit and company when he learns they're going to Hollywood. We see him one time in Miss Piggy's entrance scene, and then, finally, he crashes through the projector screen as the movie-within-the-movie finishes, finally catching up with everybody.
To prove this movie has No Fourth Wall, at one point in the movie Kermit hands the script to said movie over to Electric Mayhem to explain Kermit and Fozzie's story as to why they're traveling, as an alternative to summarizing the whole movie up to that point, since as Kermit points out, "it'll bore the audience!"
Dr. Teeth: It's the man with the badge, the PO-lice, the cops, the fuzz, the P-I-... Miss Piggy:Don't you dare! Dr. Teeth: I wouldn't think of it.
Swedish Chef's description of the malfunctioning projector, ending with "Der flip flip flip flip flip!"
Chef: Der flim is okey-dokey!
Kermit and Fozzie crashing into Gonzo on the highway:
Kermit: Fozzie, look at that funny little truck. Fozzie: Yeah, cute huh? Kermit:No, it's coming straight at us!(Everybody in both cars scream and panic, then the truck vanishes) ....We missed it! Gonzo:(Emerging from their rooftop)Oh??? You call that a miss?!
The exchange between Fozzie and Gonzo in the car:
Gonzo: I always wanted to go to Bombay, India, and become a movie star. Fozzie: You don't go to Bombay to become a movie star. You go where we're going, Hollywood! Gonzo: Sure, if you want to do it the easy way. (Beat) Fozzie: (singsongy) We picked up a weirdo...
Even better when you find out this wasnt an ironic joke about Bollywood; the crew legitimately had no idea how huge the Indian film industry is.
El Sleezo Cafe is filled with outrageous stereotypes of all shapes and sizes. Apparently, it's the bar that all jokes walk into.
When Teddy Savalas tells Madeline Khan she'll get warts from touching Kermit, Kermit informs him it's just a myth.
El Sleezo Tough: Yes, but she's my myth. Kermit: No, no, myth, myth! "Myth" (Carol Kane): Yeth?
And again when Hopper claims his operation is expanding, just like frogs do.
Kermit: That's a myth. Hopper: A what? Kermit: Myth! Myth! Myth: (appearing behind the billboard) Yeth?
When the Electric Mayhem is introducing themselves to Kermit and Fozzie...
Floyd: Show 'em what you do, Animal! Animal: Ah, what do! Eat drums! (Begins gnawing on his cymbals) Dr. Teeth: No no, beat drums! Beat drums! Animals:(Stops) ...Beat drums! Beat drums! (Begins head butting his drums)
Miss Piggy singing "Never Before, Never Again", accompanied by a mockingly saccharin love montage. Especially funny is the end of the song when Piggy tries to hit a high note, and goes completely off-key.
In the ghost town scene when Kermit encounters a rain barrel that plays loud music. Dr. Bunsen Honeydew explains what it is.
Kermit the Frog: (As the barrel plays Lady of Spain) YIKES! (Calmly) What is that?!? Dr. Bunsen Honeydew: That is one of my latest invention, A Musical Rotating Rain Barrel. Kermit the Frog: Oh, Yeah! Dr. Bunsen Honeydew: You see, I am Dr. Bunsen Honeydew, And this is my assistant, Beaker. We live here perfecting useful inventions. Come in, Come in!
Fozzie and Kermit enter an old church to see the Electric Mayhem jamming out...
Fozzie: They don't look like Presbyterians to me.
Kermit as a movie director.
Kermit: Miss Piggy, you look beautiful! Miss Piggy: Thank you! Kermit: (aside) Hollywood talk.
When Floyd asks Dr. Honeydew what he can do with his growth pills, he happily shows off "a four foot prune!" The reaction by Floyd is priceless: "A four foot prune."
Kermit has rejected Doc Hopper's offer to be the spokesfrog for his chain of "French Fried Frog Legs" restaurants and is walking back to the car.
Fozzie: (looking at the money) Five hundred dollars? Would you consider a bear in a frog suit? Kermit: Fozzie! Fozzie: I'm sorry, sir, I just lost my head. (They drive off) Doc Hopper: Wait a minute, Mr. Frog. Everything's negotiable!
When Kermit and Fozzie take off:
Doc: Max, follow that frog! (Max starts to drive off, leaving Doc behind) Doc: MAX! (Max backs up) Doc: Follow that frog with me in the car!!
The labeling of the Blu-Ray, "The Muppet Movie: The Nearly 35th Anniversary Edition", hangs a lampshade on Disney's tendency to release anniversary editions of their movies either one year early or one year too late. (e.g. the Mary Poppins 50th Anniversary Edition, which was released during the year of its 49th anniversary.)
There was debate during the screenwriting process over whether Doc Hopper would be swayed by Kermit's impassioned words and let him go, or if he would stay a villain. Jim Henson gave a flowery speech about how the key appeal of the Muppets is their innocence, and that innocence would touch the heart of even a cold-blooded businessman like Hopper. Frank Oz's eloquent rejoinder was, "Bullshit, Jim."