A mysterious person comes to Townsville challenging anyone who can to last on his swingset. Against the Professor's wishes, the girls take up the challenge and swing so high that they end up in an alternate dimension where everything is perfect.
This episode contains examples of:
- Alternate Universe: The girls end up in one where everyone is happy, the Mayor is competent and runs Townsville with no problems and the girls' enemies are all reformed. However rather than be happy, the girls find the world way too off. Eventually finding out it was Allegro trying to trap them in a perfect world so he could fuel himself from their happiness.
- Laugh Track: Used during the alternate world Townsville scenes, painting it like a 50s sitcom.
- Lotus-Eater Machine: The alternate world acts as one to the girls as them being happy will help Allegro regain his power after their last encounter. However the girls don't fall for it and re-swinging back over the swingset allows the girls to return home.
- Missing Child: The girls disappear when swinging over the swingset. They later see a reflection of the Professor (the real one) in a mirror calling the Mayor if they have any word on the girls, clearly distraught over their disappearance. The girls try to get his attention, but he can't hear them from their side of the dimension.
- Noticing the Fourth Wall: The girls are aware of the Laugh Track in the alternate universe. It's their first sign that something is wrong.
- Oh, Crap!: Bubbles when she sees the Professor among the crowd as the girls are reaching maximum height on the swingset.
- Papa Wolf: The Professor is present when he sees the girls disobeying his orders about the swingset. He's angry at first but when the girls don't reappear, he's heartbroken, as the girls see in the bathroom mirror of the alternate Townsville.
- Shapeshifter Guilt Trip: Allegro's army takes the form of Townsville citizens, making the girls reluctant to attack them. Once they realize they're not dealing with their loved ones, the girls beat them up, causing them to transform into their true forms.
- Stepford Smiler: Everyone in the alternate world Townsville. Then again, they're all Allegro's army of party animals taking the forms of the Townsville people.
- You Are Grounded!: The girls manage to return home and the Professor is relieved they're alright. However, they're still grounded for disobeying him for going on the swingset when he forbade it.
