Back in Gimmelshtump

"Doofenshmirtz's Backstory", sung by Heinz Doofenshmirtz, will take place after Doofenshmirtz explains his shceme to Perry the Platypus in Rollercoaster: The Musical!.

Lyrics
Heinz ripps off lab coat, revealing a tanktop, leatherpants, and a World War Two german soilder helmet

Heinz: Baaaaaaack in Gimmelshtoomp, I always had to keep it real! Cause when you grow up in Gimmelshtoomp, "'Young Heinz:: your childhood is less than ideal Heinz: So I don't dwell on how i'll crawl my way out of a gutter! No I don't! When people ask me what I mea, I say, Di-Di-Di-Do I stutter! Switches to Broadway theme Heinz''' But I'm no longer a hater, Cause I got an Inator, And a over-complicated scheme! I get a couple of checks, Every month from my Ex! So I can finance my (unaudible) machine! And though my past was a wreck, I am glad it won't deck, my asperations to cause mass hysteria! Cause I'm as sure as can be, that it's my destiny, to become ruler of the tristate area! Hey Ferb!