Heck of a Day

 is a song played in "Road to Danville" as Perry and Doofenshmirtz walking in the desert.

Lyrics
Danny Jacob: Nowhere to go, nothing to see

Except sand and sand and sand (and you and me)

Doofenshmirtz: ''Hey, look how big the sun is through this magnifying glass. Aw! Aww! Oh! No really, it's huge. You should see it.''

Danny Jacob: Baked from the heat, we've got sun on all sides

Getting tanned and tanned, like we're a couple of hides

Doofenshmirtz: ''I mean, he drives a taxi for heaven's sake, he can work anywhere. But he expects her to just pack up and move to Vegas. I mean, seriously!''

Danny Jacob: Two lost nomads who will never be missed

Some may just interpret this as a karmic slap on the wrist,

But I've just got to say, it's a heck of a day to be us!

Doofenshmirtz: ''I was sure my arm would grow back but it never did. See, pure titanium. It's a fact.''

Danny Jacob: It's a heck of a day to not have a car

And just walk and walk and not know where you are

Doofenshmirtz: ''You don't communicate, you know that. Y-you don't share. I-I know nothing about your private life. Very closed off. Closed. That's you.''

Danny Jacob: We got no kind of a map

Nothing that shows us the way

And it's just talk and talk and talk with nothing to say

It's a heck of a day, a heck of a day to be us!

It's a heck of a day to be us!