Homer doesn't care for Creator/MelGibson's remake of ''Film/MrSmithGoesToWashington'', and Gibson (who is looking for someone who won't kiss up to him) enlists his help in improving it.
!!Tropes featured:

* ActionizedAdaptation: In-universe. Homer criticizes the movie for having Gibson's character talk for hours and not shooting anybody (something Gibson himself regrets). Homer is invited to help edit the movie, and they mutually decide to reshoot the ending of the movie so that Mr. Smith goes on a violent rampage against the senate, culminating with him decapitating the President of the United States. Nobody likes the result, not even Jimmy Stewart's granddaughter, and in the end the movie becomes a StarDerailingRole for Gibson.
* AdaptationalVillainy: Senator Paine in Homer's revision of ''Mr. Smith Goes To Washington''. While Mr. Smith's HeroicRROD set his epiphany in the original movie, here he just laughs and makes a cruel one-liner. This provokes Mr Smith to ''massacre everyone inside the Capitol Building.''
* BloodierAndGorier: Homer's take on ''Mr. Smith Goes to Washington,'' which is more akin to ''Film/LethalWeapon'' and ''Film/{{Braveheart}}.''
* BloodlessCarnage: Mr. Smith impales a fellow senator with the American flag, machine guns a bunch more, causes the Vice President to inadvertently trigger a massive explosion that pretty much kills everyone else in the Senate Chamber (except Smith, and presumably, Homer's member of the press character), and then, as the topper, decapitates the ''President of the United States'' using the Senate's seal. Not one drop of blood is spilled in all of this; the episode may well have gotten a TV-MA rating if it was.
* CallBack: Mel Gibson is not the first man to [[Recap/TheSimpsonsS2E15OhBrotherWhereArtThou do the mistake of assuming that Homer Simpson knows what people really wants just because his tastes are simple]].
* DisownedAdaptation: InUniverse, Jimmy Stewart's granddaughter threatens to sue Mel over the remake.
* TheDogWasTheMastermind:
-->'''Creator/MelGibson:''' You want me to replace the villain with a dog? I mean nobody will know what's going on. \\
'''Homer:''' They will if you set up that the dog is evil. All you do is have to show him doing this. ''[lowers eyelids and glances around in shifty-eyed fashion]'' [[TropeNamer The people will suspect the dog.]]
** As a BrickJoke, [[http://www.youtube.com/watch?v=T55ArHjeR1c a dog with shifty eyes appears at the end of the episode.]]
* {{Gasshole}}:
-->'''Car Saleswoman:''' Thinking of saying goodbye to gas?\\
'''Bart:''' [[ExactWords You betcha]] ''[burps]''\\
'''Marge:''' Bart! ''[farts]'' Well, that shut me up.
* TheGhost: Louie, the projectionist when Mel and Homer show the executives the revised ending.
* HairTriggerExplosive: During his rampage in Homer's ending, Mr. Smith hurls a fire extinguisher onto the desk of the Vice President of the United States (the US VP serves as President of the Senate) at the central rostrum of the Senate chamber. The Vice President is banging his gavel, trying to restore order. When the VP's gavel strikes the fire extinguisher, it causes a powerful explosion '''''that blows the dome off the Capitol building,''''' and sends the statue crowning said dome (which, in this case, is Lady Justice, not the Statue of Freedom, as is actually the case) flying towards the Capitol Complex's reflecting pool.
* HighClassGlass: In Homer's version of ''Film/MrSmithGoesToWashington,'' the President of the United States wears a monocle.
* IJustWantToBeNormal: Mel.
* OffWithHisHead: Mr. Smith ends his murderous rampage in Homer's ending by removing the Seal of the United States Senate from the Senate chamber's central rostrum, and throwing it at the neck of the President like a frisbee, causing it to decapitate the Commander-in-chief.
* PanderingToTheBase : InUniverse, Homer writes a bad review of his movie so Gibson lets him work on the re-edit, thinking Homer was saying what people really felt and had the guts to tell him, when in fact it was because Homer [[GreenEyedMonster had a grudge against Mel at the time due to Marge's infatuation with him]].
* PreMortemOneLiner: When Mr. Smith receives the machine gun from the member of the press played by Homer in the new ending, he backflips onto a table in front of the Senate chamber's central rostrum, then says, "All in favor, say ''die!''" before quickly doing an imitation of Curly from The Three Stooges (Mel Gibson is a noted Three Stooges fan), then proceeding to fire the gun.
* {{Pun}}: When the studio executives are chasing Homer and Mel, their car is hit by what appears to be Mel Gibson...
--> '''William Milo''': This is just a dummy!\\
'''Edward Christian''': I know, but he sells tickets. ''[long pause as neither of the execs laugh]'' ... Let's go.
* TheScapegoat: When Homer asks Mel why he thinks the country has lost its way, Mel replies with, "I blame the internet. And the return of swing music."
* ScrewTheRulesIHaveMoney: The executives behind Mel Gibson's version of "Mr. Smith Goes to Washington" already bought awards and this is their main reason to oppose Homer's remake of the movie.
* ShoutOut: The episode title is one for Mel Gibson movie ''Film/MadMaxBeyondThunderdome''.
** Gibson gets one to ''Film/LethalWeapon'' during his and Homer's escape from the studio.
-->'''Mel Gibson''': [[CatchPhrase I'm getting too old for this crap!]]
** Homer's ending shows Mr. Smith throwing his senator's badge away, like the ending to ''Film/DirtyHarry''.
* SkewedPriorities: When Mr. Smith is shooting up Congress, one of the congressmen chides him, "Mr. Smith, this is highly unorthodox!"
* TakeThat: One of the executives said Homer's changes made Gibson's movie worse than ''Film/TheGodfatherPartIII'' and Mel Gibson told him not to say that kind of thing. The executive conceded he went too far with the comment but still wanted to destroy Homer's film.
* TooDumbToLive: In Homer's ending, none of the senators attempt to escape before Mr. Smith starts firing the machine gun. Neither does anyone sitting in the gallery above the Senate floor.
* ViewersAreMorons: When the President of the United States walks into the Senate Chamber after the Capitol's dome has been blown off, he introduces himself, even though a few notes of "Hail to the Chief" played before he did so.
* WackyFratboyHijinx: Homer pitches a movie idea to Mel that sounds like the plot to ''Film/AnimalHouse'' (or ''Film/AmericanPie'', since he mentioned "nerdy teens trying to get some," and, at the time, movies like that were making a comeback).
* YourSizeMayVary: Mr. Smith appears to shrink down to about 2ft tall when he's cartwheeling around on the table shooting up the Senate.