Phineas and Ferb2007

Dr. Heinz Doofenshmirtz:
Back story time! You see, Perry the Platypus, when I was boy my mother would never let me swim in public pools.

[flashes back to Heinz as a child standing with his mother near a public pool; he looks at her longingly]

Dr. Doofenshmirtz's Mom:
No.

[back to reality]

Dr. Heinz Doofenshmirtz:
What? That's it! You know, not every back story has to have some big, in-depth spiel, Mr. High Expectations.