Doofenshmirtz is annoyed at waiting in long lines to return things, so he invents a Back-to-the-store-inator to do the job for him. Also, Phineas and Ferb create extreme batting cages for an ultimate baseball game, and Candace wanders away from her errands with Mom to go to a wild water park with Jeremy.
Tropes:
- Continuity Nod: Doofenshmirtz gets sent back to the hospital where he was born.
- Foreshadowing: Near the start of the episode Candace is convinced by Linda to accompany her to the store, forgetting she's still on the phone with Stacy, hinting at how she would do the same thing again later, going to the water park with Jeremy, forgetting to notify Linda.
- Gasshole: Jeremy catches Candace at the embarrassing hygiene products aisle of the store and she is embarrassed by this, which is why she agrees to go to the water park with him. Later, she tells Jeremy the truth and Jeremy accepts her for this. But just as she hugs, Candace farts.
- Genki Girl: Isabella has her moments during the baseball game.
- Shout-Out: Buford's successful bat is a parody of The Natural, even having a pastiche of Randy Newman's score.
- Surprisingly Realistic Outcome: Candace leaves for the water park with Jeremy without even telling her mom, and she's furious when she finds out.
