Albert Brooks guest stars in the episode, playing the character Tab Spangler, as well as briefly reprising Jacques from "Life on the Fast Lane".

Due to the high fat and sugar content in the snacks, the high frequency with which he eats them, and the fact that he sold off his skateboard to Groundskeeper Willie (who starts using it and gets injured from falling down the stairs while on said skateboard) to buy snacks, after three weeks, Bart significantly gains weight and becomes obese and, during an in-show parody of the opening credits, he suffers a heart attack after slowly trying to make it home from school.

When Bart tries to run away, due to his widened and obese frame, he gets stuck in a fence and is caught by two representatives of a maximum security fat camp, Serenity Ranch.

Bart ends up there with Apu, Rainier Wolfcastle (who was last seen fattening up for a movie), and Kent Brockman, and the camp's leader is none other than former U.S. Marine Tab Spangler (who is dealing with many anger issues).

At the fat camp, Bart cheats by sneaking food that is disposed of, so Spangler takes him home to visit the family to show him the horrors that occur.

The Germans humiliate the family, making Homer sing & dance for change and forcing Marge and Lisa to clean intentional messes while pointing out America's problems one by one.

It was his first appearance for almost a decade, having previously voiced characters in the episodes "The Call of the Simpsons" (1990); "Life on the Fast Lane" (1990); "Bart's Inner Child" (1993) and "You Only Move Twice" (1996).