One Day in the Life
From A KoL Wiki

"Hey, you!" says one of the Bugbear trainers, as you approach the Pen in disguise.
"Ivan! Where have you been? We've been looking all over for you! Get back to work!"
Before you can remove your costume and explain that you're not really a bugbear, you're forced at whippoint into a chain gang of bugbears, and spend the rest of the day learning how to break rocks apart with your claws and carrying anvils back and forth between two buildings.
What a horrible experience. You emerge with a newfound respect and sympathy for bugbears.

Found in The Bugbear Pens (post-Felonia).
Rumored to be mutually exclusive with The Bugbear Baker adventure.
This adventure is a reference to One Day in the Life of Ivan Denisovich, by Aleksandr Solzhenitsyn.