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When SpongeBob launches two patties into space in "The Krusty Krustacean's Kantankerous Kommercial".
During The King's ending in "Lightning McQueer and the Quest for Tires", representing the fact he's supposed to be Ric Flair.
April Fools' Day: "InSHREKtion" came out April Fool's 2014. It appeared to be a YTP that was teased at with a Real Trailer, Fake Movie in "Hank Hill's Airport Apocalypse", but upon watching, was the infamous Rick Roll tinted green and with images of Shrek...that is, until a minute in, where a skit-based YTP starts.
At the end of the episode, said fish is revealed to have survived the posion, and comes back with a literal bang, and attempts to kill Spongebob with a pistol. It doesn't work, because Spongebob is made of a spongy material which adsorbs the bullets, and proceeds to eject said bullets from his holes into the body of the fish, killing him.
Lightning McQueer and the Quest for Tires: Lightning's ending. He tries to turn back time to prevent Captain Falcon from sneaking up on him and winning, but all this does is cause a time paradox because he wouldn't have had a reason to turn back time if he had won in the first place. The ending is presumably erased from time.
And Now For Something Completely Different: Hank Hill's Airport Apocalypse has three short intermissions/interruptions sprinkled throughout the video, only one of which having anything to do with King of the Hill: the first is the trailer for InSHREKtion, the next is when Valve hijacks the video and their headquarters promptly get blasted by Lemon himself, and the third is the Four Pilots, where Kahn and the three men from the restaurant are depicted as flying an airplane.
In "The SpingeBill Collection", we see some fish in a theater preparing to watch a movie. All of a sudden, the THX Vanity Plate appears, as well as the annoyingly loud sound effect that goes along with it. It is so loud that one fish is bleeding out of his ears.