Episode - 9F18\\
First Aired - 4/29/1993

Bart is expelled from school after running down the Superintendent with Groundskeeper Willie's tractor, and Marge takes to home-schooling Bart after transferring him to another school proves useless. Meanwhile, Lisa is sickened and disgusted by an upcoming town holiday where snakes are driven to the center of town and beaten.

The episode was awarded the Genesis Award for "Best Television Prime Time Animated Series" in 1994 for "consciousness-raising on behalf of animal issues."

!!This episode contains examples of:
* {{Acrofatic}}: Homer's Whacking Day-style karate moves. Worth noting, given that most episodes before and after this one establish that Homer is so fat and out of shape that the slightest movement leaves him winded.
* ArtisticLicenseHistory and FridgeBrilliance: Grampa's story about how he had to pose as a German cabaret singer after he got separated from his platoon during a raid in Dusseldorf isn't true, not just because of how cartoonish the flashback was, but because the German cabaret was outlawed in 1935, with many involved either fleeing the country or getting put in concentration camps due to their anti-Nazi views (and some of the performers possibly being Jewish). The Dusseldorf air raid that Grampa was said to be a part of happened in 1942.
* AsHimself: Music/BarryWhite
* BrickJoke: The story starts with Principal Skinner locking Bart, Nelson, Dolph, Jimbo, and Kearney in the school's bomb shelter before the superintendent's inspection. Bart is able to get out, but the other bullies are forgotten about -- until the end when Skinner invites Bart back to school for saving the town, then realizes that he didn't let the bullies out of the bomb shelter (and the bullies have started a support group about their behavior).
* CensorBox: Parodied in the news report about a nudist colony for animals.
* ComicallyMissingThePoint: The crowd cheering Barry White when, after having just learned the true origin of Whacking Day, he expresses his disgust of them for supporting such an observance.
--> '''Barry White''': Were they even listening to me?
--> '''Mayor Quimby''': I, uh, don't think so.
* ContrivedCoincidence: Barry White passing by the Simpsons' house after telling the crowd how disgusted he was at Whacking Day, just as Bart and Lisa are looking for music with bass to lure the snakes to safety.
* FolkHero: Jebediah Springfield's tale of whacking snakes turns out to be an excuse to beat up the Irish.
* GettingCrapPastTheRadar: Some of the lines of dialogue and scenes centered on Whacking Day can be construed as sexual: Marge getting aroused when Homer tests out his new whacking stick, Homer asking Marge if he should start out slow or go fast when whacking snacks, and Miss Springfield opening the festivities with "Gentlemen, start your whacking!"
* ImperialStormtrooperMarksmanshipAcademy: While target practice in training for Whacking Day, Wiggum tells Eddy and Lou to aim for the body of a paper target of a snake. A light next to the target is promptly shot out.
* LegitimateBusinessmensSocialClub: Possibly the {{trope namer}}. During the march through town, TheMafia's banners read "Legitimate Businessmen's Club". Instead of beating the snakes to death, [[JustShootHim they just shoot them.]]
* NoodleIncident: Homer hit a referee with a whiskey bottle one time. The only other information given is that Lisa remembers it and it happened because Homer squeezed his rage into a bitter, little ball, then released it at an appropriate time. We don't know what sport it was or whether or not Homer got away with it.
** The time Grampa wore a dress in the 1940s ([[MakesSenseInContext not that messed-up flashback of him posing as a German cabaret singer and flirting with Hitler until his breast padding fell out]]). The only information we get out of it is that the designers were really good back then (though the season 17 finale "Homer and Marge Turn a Couple Play" reveals that Albe and Jasper dressed up as women and joined a baseball team to avoid getting drafted. Maybe it's a {{CallBack}} to this, maybe not. The writers don't say and fans are left to speculate).
* TheParody: Of Creator/OliverStone's ''{{Film/JFK}}''. In an ''Itchy and Scratchy'' cartoon with "special guest director Oliver Stone", Scratchy is escorted out of a jail, like Lee Harvey Oswald, and is shot by Itchy, like Jack Ruby.
* RealitySubtext: The plot of "Whacking Day" was based on the famous [[http://en.wikipedia.org/wiki/Rattlesnake_round-up Rattle Snake Roundups]].
* WhatHappenedToTheMouse: What happened between Groundskeeper Willie and the mysterious Scottish woman he met?
** Another example is actually subverted at the end of the episode when Skinner remembers that Nelson, Jimbo, Dolph, and Kearney are still locked in the school's bomb shelter.