Carbohydrates.

I sit and wait surrounded by wire barb.

Waiting for the last bite of a sweet, sweet carb.

Haven't had one in a while,

As it turns out.

Only thing I'm eating these days

Are heaps of self-doubt.

They escort me through a narrow door,

And there's pizza, pasta and burgers galore!

I bump the table

As I make my way

There, on the floor, 

The carbs now lay.

It's fitting, though,

Eating like a rat.

Karma can be a dick like that.