Homer fears the Biblical end of days is coming after watching a movie and seeing what he thinks are signs of the Apocalypse.

!! Tropes:

* AuthorTract: The movie ''Left Below'':
-->'''Thompson''': It's the Rapture, Shauna, the Rapture! The virtuous have gone to {{Heaven}}, and the rest of us have been... [[Literature/LeftBehind Left Below]]! We were fools! And because we rejected God (tacitly accepting Satan), we must suffer through the Apocalypse.\\
'''Buddhist Monk''': I thought all religions were a path to God; I was wrong!\\
'''Scientist''': Why did I put my faith in science and technology?!\\
''' Homosexual''': Oh, [[ArsonMurderAndJaywalking why did I choose to be gay]]?!
* TheCloudCuckoolanderWasRight: Homer was right about the timing of the Apocalypse.
* ShoutOut: For his haircut, Ralph Wiggum produces a photograph of [[ComicStrip/{{Peanuts}} Charlie Brown]] to show what he wants his hair to look like.
* ShowWithinAShow: ''Left Below'', a parody of ''Literature/LeftBehind''.
* StatusQuoIsGod: God restores the Status Quo by chanting "Deus ex Machina".
* TakeThat: The ''Left Behind'' analogue is (accurately) depicted as [[StylisticSuck an extended author tract with the subtlety of a sledgehammer.]]
-->'''Homer:''' This movie will haunt me for the rest of my life, just like Cannonball Run 2!
* TitleDrop: One of the characters in the movie "Left Below" comments that he and others were left below. Cue Homer wondering where he's heard that before.
* UngratefulBastard: After Homer's first calculations prove incorrect, everyone treats him like a pariah. This wouldn't be so bad, except Homer's initial prediction brought out the best in people like Moe. However, they don't look at the upside, nor do they consider Homer had their best interests at heart. It's made worse when [[Main/KickTheDog Marge throws Homer's corrected calculation back in his face]]. As Homer drives to the Mesa again, [[DiscussedTrope he actually considers this trope]].
* WhatHappenedToTheMouse: Despite being far more devout than Homer, and aware of the Rapture party, there's no sign of Ned, or any of the Flanders family, in Heaven after the apocalypse.