Somewhat inspired by the song Savin' Me by Nickelback. Somehow, I can see a broken, desperate Zim singing it to Dib. Don't know why he's in prison, or where... perhaps Dib finally captured him and that's where the Swollen Eyeballs are holding him... I like to think he's giving Dib that sullen glare.
You can bet that he'll be up in a few moments, going over to the bars to demand (plead) that Dib let him out.

"Show me what it's like
To be the last one standing.
Teach me wrong from right,
And I'll show you what I can be.

Say it for me,
Say it to me.
And I'll leave this
Life behind me.

Say it if it's worth savin' me!"

Yeah, I don't know. Enjoy this quickly drawn MS Paint monstrosity.