The Annoying Cornjob Song, also sometimes known as The Bike Song, comes from the episode Gamera vs Guiron.
Tom: (singing) We're gonna ride our bicycles,
Joel and Crow: (joining in, singing) We're gonna go and have some fun,
We're gonna fill our hearts with love,
When we ride our bicycles.
Tom: (singing) When we ride our bikes!
All: Why did they have to shoot my scarf?
I am the twisted lonely guy...
Tom: Let's watch the kids go to their fate,
They'll disappear into the woods,
It'll be days before they're found,
Cornjob will be bl-amed.
Crow: Why must we sing this stupid song?
It's getting really annoying,
We apologize for its length,
All: We are filled with shame.
Joel: (spoken, annoyed) Now back to our show!