The prologue, with Flappy Bob's parents firing him off in the Human Bullets cannon off from the circus train because they think its heading towards a broken bridge. Then the train switches onto another track.
Clown!Mom: (understandably furious) I thought you said there was no other way!
Clown!Dad:I'M A CLOWN!!!!
The opening song number, "Kids Just Being Kids", with the kids wrecking the town with their out of school antics, thanks to the Pixies replacing their harmless toys and bikes with demolition equipment and motorbikes.
Mr Crocker: It's not my problem 'til September 3rd!
Jorgens Villain Song "Pull Back The Fairies", which is, of all things, a POLKA. One of the scenes shows him marrying Da Rules and he's the bride.
Jorgen interogating Wanda about the events on Earth.
Wanda: Shouldn't there be a good cop AND a bad cop?
Jorgen: We had cutbacks. Now, do you want to spend your whole life in fairy jail, or do you want to blame Cosmo?!
Jorgen: *flips over a badge he's wearing saying "Bad Cop", with the other side saying "Good Cop* Pleeease?
Jorgen: Ach, Good Cop over! BLAME COSMO!
As bad as the Pixies raising Flappy Bob was, he didnt exactly do too good for himself on his own before they interfered. The special has a scene where he is asking out a girl, in full clown makeup, with a pie where the frosting says "I Luv You"... which he then throws in her face.
Flappy Bob's reunion with his parents has said parents explaining that they searched for him everywhere there could be clowns. Including...