After Homer's jerk ways at the supermarket causes a bag boy strike, the Simpsons are left without food -- until they find a 1960s-era box of animal crackers advertising a contest where the winners get to go to Africa.
!!Tropes appearing in the episode:
* ArtisticLicenseBiology: Rhinos lay eggs, hippos are afraid of water, giant spiders exist and giraffes live underground. Lisa is neither impressed nor amused.
* BaitAndSwitch: Just as it looks Joan's madness for collecting diamonds would convince the Simpsons to put her in jail, the family but Lisa accept the proposal and happily leave Africa behind.
* EatTheCamera: Homer, at the end of the second act.
* EverythingsBetterWithMonkeys: Or chimpanzees in this case.
* EvilPoacher: Subverted. The poachers turned out to be Greenpeace members.
* LanguageBarrier: When the Simpsons are lost in the jungle, sailing down a river, they encounter two ominous sounding tribesmen, so Homer tries to hit them with a spear. However, they were actually saying very nice things, at least according to the subtitles.
* NeverSmileAtACrocodile: "Don't worry. Getting eaten by a crocodile is like going to sleep... in a giant blender."
* RealityEnsues: While lost in the jungle, the family falls into a large flower that closes its petals around them which causes Marge to exclaim that it's trying to eat them. Homer casually tears one of the petals open and walks out.
--> '''Bart:''' Wow dad, how did you do that?
--> '''Homer:''' (deadpan) It's a flower.
* RedHerring: The episode starts with bag boy's strike. It is referenced by Homer twice during the trip just to really drive home its Herring status.
* SanitySlippage: "No! Don't put me away. I'll give you diamonds. Everybody wants diamonds. Diamonds will make everything all better. Diamonds! Diamonds!!!" Everyone but Lisa accepts her crazy proposal.
* ScrewTheMoneyIHaveRules: Lisa wouldn't take any diamonds Joan Bushwell tried to bribe the Simpsons with.
* ScrewTheRulesIHaveMoney: Or diamonds in that case as Homer, Marge, Bart and even Maggie can confirm.
* ScrewThisImOuttaHere: As the African tribal chief N'Gungo senses the Simpsons are coming.
-->'''Tribesman:''' What is it, N'gungo?
-->'''N'Gungo:''' Evil is coming...
-->'''Tribesman:''' What shall we do, N'Gungo?
-->'''N'Gungo:''' (''takes mask off and puts it on the Tribesman'') You are N'Gungo now! (''runs away screaming'')
* VacationEpisode: The Simpsons travel to Africa.
* WhaleEgg: The rhino has just hatched out of the egg!
* WhatHappenedToTheMouse: The bag boy crisis is never resolved.