Back in Gimmelshtump

, sung by Heinz Doofenshmirtz, takes place after Doofenshmirtz explains his scheme to Perry the Platypus in "Rollercoaster: The Musical!".

Lyrics
Dr. Doofenshmirtz: ''I know you're probably expecting some tragic backstory to explain why I want to reverse the rotation of the Earth. But I'm not gonna go there, ya know why? Well I'll tell ya. ''

Back in Gimmelschtump

I always had to keep it real

Cause when you grow up in Gimmelshtump

Young Heinz: Your childhood is less than ideal!

Dr. Doofenshmirtz: So I don't dwell on how I'll crawled my way out of the gutter

No I don't!

When people ask me what I mean, I say

D-D-D-Do I stutter!

Dr. Doofenshmirtz: But I'm no longer a hater

Cause I got an Inator

And an over-complicated scheme

I get a couple of checks

Every month from my Ex

So I can finance my coming regime!

And though my past was a wreck

I won't let it affect

My aspirations to cause mass hysteria

Cause I'm as sure as can be

That it's my destiny

To be the ruler of the Tri-State Area!

Background Information

 * In a similar theme to History of Rock, more than one genre of music was heard.
 * The beginning of this song strongly resembles Bryan Adams', Run to You.
 * It is unknown how Young Heinz knew he was going to sing this song and say "Your childhood is less than ideal".
 * Balloony and Norm can be seen in the background.
 * Dr. Doofenshmirtz calls Charlene Doofenshmirtz his ex-wife again ("Hail Doofania!", "Thaddeus and Thor", and "Finding Mary McGuffin").
 * The Background Dancer says she's "picking up my kid from school", while this episode takes place in summer (although this could mean summer school).
 * The background dancers Doofenshmirtz is seen singing in front of constantly change between parts, including the same dancers from "Hey Ferb".
 * Dr. Doofenshmirtz is wearing a WWI era German helmet, the pickelhaub.
 * Dr. Doofenshmirtz's hat's stripe color is red, but in his early songs, it is colored green, except in Charmed Life, where it is colored purple.
 * This song proves that Dr. Doofenshmirtz is from a country like Germany.
 * In the album version of the song, the line "Your childhood is less than ideal!" is sung differently in a higher pitch, probably to make clear that was the young Heinz. (In the Spanish version also changed but less high pitched)
 * This is the second time Doofenshmirtz has removed his turtleneck and lab coat ("Are You My Mummy?").
 * This is Doofenshmirtz's last musical performance in Season 2.

Continuity

 * Doofenshmirtz has a big belly, which means he still hasn't lost those ten pounds. ("Fireside Girl Jamboree")
 * The tune of the second part of the song is similar to Impress My Professor.
 * His backup dancers haven't seemed to change much but how he pays them enough is unknown.
 * The Background of a part on the rock part shows Balloony.
 * Second song of Dr. Doofenshmirtz that starts with the word "back", the first was Impress My Professor in "Oil on Candace".