In what is recognized as one of the darkest episodes of the show, a normal man named Frank Grimes gets a job at the nuclear plant and takes an instant dislike to Homer and his AchievementsInIgnorance. Meanwhile, Bart wins an abandoned factory at auction and uses it as his own personal playground.

YMMV tropes for this episode can be found [[YMMV/TheSimpsonsS8E23HomersEnemy here]].
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* BerserkButton: Homer is one giant button to Grimes. Also the latter doesn't liked being called "Grimey" or "Stretch".
** To elaborate, it starts with how lazy Homer is while Frank is a self taught workaholic who climbed his way up. Homer tries to be friendly by inviting Frank for dinner but seeing all the success Homer has acquired without having to actually work for it (according to him anyway) drives Frank over the edge and he assumes Homer is flaunting this in his face. The last straw comes when Homer wins a kid's contest and the audience actually applauds him for it to Frank's chagrin and sanity.
* BewareTheNiceOnes
* BlackComedyBurst
* EmbarrassingNickname: Homer nicknames Frank Grimes "Grimey'", which he hates.
* {{Expy}}: Frank Grimes is based on Michael Douglas' character Bill Foster from ''FallingDown''.
* {{Foreshadowing}}: When Frank Grimes asks Lenny and Carl how someone like Homer could be safety inspector Carl simply says, "It's best not to think about it."
* OnlySaneMan: Grimes
* PlotHole: Kent Brockman's report at the beginning of the episode show Grimes living in a normal house, yet later in the episode the latter claims to live between two bowling alleys ("above a bowling alley below another bowling alley")
* SpringtimeForHitler: Frank tricks Homer into entering a power plant designing contest for kids as an attempt to show the world what an idiot Homer is. Homer ends up winning, and Frank's sanity utterly disappears after this.
* StrawmanHasAPoint
* TheEveryman: Frank Grimes is supposed to represent the viewer in this episode. A man that appears in no way remarkable who never got any breaks and had to work hard every day of his life with little to no rewards.
** Normally it's Homer that we're supposed to feel the viewer embodies, a middle class worker with a nuclear family and somewhat below average intelligence. However, during this episode it lampshades how un-average Homer's life is compared to how we are supposed to perceive him (Astronaut, friends with celebrities, award winning musician) and how successful he is and how his actions have no consequences.