[[quoteright:291:http://static.tvtropes.org/pmwiki/pub/images/pantry_291_20080410-172315.jpg]]
[[caption-width-right:291:What do you ''mean'' "you forgot"?]]

A situation wherein a character hopes to demonstrate his preparedness by showing the massive amounts of canned foods he has stocked in case of an emergency. The demonstration is ruined when he, or another character, points out that he has no can opener. This is usually played for laughs, though it can work as a dramatic situation if the characters are starving. However, the drama of the scenario is somewhat undercut by how [[FridgeLogic any tin can can be cracked open by using a knife (or even a spoon) to create an opening and slice the top open]]. (Or even just brute force if you're really desperate/creative. Tin can lids work as chisels, by the way.)

Mostly becoming a DiscreditedTrope as a result of the above, and the fact that most companies are making the transition to pull-tabs on their cans. Still, enough cans remain un-tabbed that it should still be relevant for a while. As a side note, this is a bit of TruthInTelevision: The sealed tin can was invented in 1810, but the first tin can opener was produced in 1858, meaning that for almost 50 years, ''everyone'' had to rely on the chisel-and-brute-force method... of course, [[FridgeLogic that just makes you wonder why fictional characters are so freaked out by it]].

The pop-top can was invented by Ermal Cleon Fraze, in 1959, after going on a picnic with his family, and discovering that he had failed to bring along an opener for their canned soft-drinks.
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!!Examples:

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[[folder:Anime & Manga]]
* In ''Manga/{{Akira}}'', two soldiers eat food out of a can stash an old woman had. The old lady had starved to death, because she was afraid someone would steal the stash, so she wouldn't dare ask anyone for a can opener.
* Averted and discussed in the ''Manga/CromartieHighSchool'' episode "Joshua Tree".
--> '''Hayashida:''' Do we have a can opener?
--> '''Maeda:''' Yeah, you idiots, I brought one.
--> '''Hokuto:''' On television, most of the time, people have canned food but no way to open it. Good job, Maeda.
* During the island arc of ''Anime/NadiaTheSecretOfBlueWater'', the kids discover a wreck and manage to salvage some canned goods. Deciding to "live with nature", Nadia abandons Jean and Marie and sets off into the jungle, but not before taking some food with her - only to realize too late that her "even the simplest technology is bad" mentality is far from conductive to getting any of it out of the cans. She keeps smashing them flat with big rocks.
* Occurrs in ''Manga/UruseiYatsura'' when Ataru and company gets lost in some caves, start to starve, and stumble into a stranded UFO with a sleeping alien... and a stack of cans. Eventually they find a opener at the bottom of a shaft (although it actually leads out into the open, and Ataru steals an opener from a classmate without knowing). Then they find out the hard way the hazards of eating alien food...
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[[folder:Film]]
* In the original ''Film/DawnOfTheDead'', the characters discover a massive stockpile of spam.
-->'''Roger''': Did you bring a can opener?\\
'''Francine''': No, I guess I didn't.\\
'''Roger''': Then don't knock it. It's got its own key.
* ''Film/TheNavigator'' features Creator/BusterKeaton and his girlfriend alone on a passenger liner that's gone adrift in the open ocean. Buster finds a can of milk, but he has no can opener, so he tries increasingly ridiculous tools, like an industrial drill, a cleaver, and a huge meat axe. Finally he jury-rigs a can opener.
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[[folder:Literature]]
* ''Literature/IHaveNoMouthAndIMustScream'': A rare effective dramatic example, as the canned goods in question are the goal of the tortuous SnipeHunt the cast is sent on by the evil AI, and thus it makes sense that they could not be opened by brute force.
* ''Literature/ThreeMenInABoat'': On a boat trip. Played very much for laughs, with what seems to be the world's most indestructable tin of pineapple.
** Creator/RobertAHeinlein's ''Literature/HaveSpaceSuitWillTravel'' mentions this story but otherwise has no relation to this trope.
* Happens on a camping trip in one of the ''Literature/AdrianMole'' books.
* There is a short story about a family of tortoises who go on a picnic, packing a number of canned things, and forget to pack the can-opener. Being tortoises, going back for the can opener would take a very very long time.
* In ''Literature/{{Animorphs}}'', Marco forgets a can opener after he and his family are forced to flee and hide in the Hork-Bajir valley. Fortunately, there are more than enough blades on the Hork-Bajir themselves to make it not a problem at all.
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[[folder:Live Action TV]]
* ''Series/ToTheManorBorn.'' Audrey and Marjorie are on a picnic. Audrey is a bit miffed that sardine tins don't have keys anymore, and then they discover they forgot the can opener.
* In ''Series/{{Bottom}}'', Richie and Eddie are forced to camp in a nasty London park for a week. Much to Richie's relief, Eddie remembered to bring his can opener. However, Richie ''[[InvertedTrope forgot all the cans]]''.
* Averted in ''Series/TheBionicWoman'' where Maxmillion, the bionic dog, does not need an opener to feed himself. All he has to do is bite the can open with his bionic jaw.
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[[folder:Newspaper Comics]]
* ''ComicStrip/{{Garfield}}'': On a camping trip. Variant during a blackout. They have plenty of canned goods and a can opener, but the can opener is electric.
* ''ComicStrip/BloomCounty'': In Steve Dallas' fallout shelter. Also in relation to the survival rations Opus packed for Cutter John's fateful wheelchair-balloon voyage. Cans of food, but no can opener.
* ''ComicStrip/LibertyMeadows'': While the characters take refuge from a forest fire.
* ''ComicStrip/TheFarSide'': In a fallout shelter.
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[[folder: Webcomics]]
* The Wayward Vagabond in ''Webcomic/{{Homestuck}}'', when we first meet him, has discovered a wide range of canned foods, but no can-opener. He attempts to open the cans with his [[http://www.mspaintadventures.com/?s=6&p=002572 teeth]], his [[http://www.mspaintadventures.com/?s=6&p=002573 claws]] and his [[http://www.mspaintadventures.com/?s=6&p=002583 trusty knife]], all of which are completely useless. So [[MakesJustAsMuchSenseInContext he declares himself]] [[http://www.mspaintadventures.com/?s=6&p=002585 Mayor of Can Town]] instead.
* ''Comicbook/{{Buni}}'' [[http://www.bunicomic.com/comic/buni-50/ plays it straight.]]
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[[folder:Western Animation]]
* ''ComicStrip/DennisTheMenaceUK'': Dennis tells Gnasher a parody of ''Jack and the Beanstalk'', where Dennis (in the role of Jack) gets a tin of beans, but can't open it because tin openers have yet to be invented. In the end, he [[spoiler:uses his third wish [[FantasyKitchenSink from a genie]] to get an electric can opener, thus his family are able to dine on beans]].
* ''WesternAnimation/LooneyTunes'': In the short "Canned Feud", Sylvester is left in the house while his owners are away. There is plenty of canned tuna, but only one can opener, and the mouse has it. Hijinks ensue.
* ''WesternAnimation/{{Futurama}}'', "Mother's Day": Subverted: After all electrical appliances rebel, Fry boasts that he can still open cans with his pocket knife. It's only when he can't that he starts to despair. Dr. Zoidberg then uses his claws to open the can.
--> '''Zoidberg:''' Hooray, I'm useful! I'm having a wonderful time!
* Happened in a ''WesternAnimation/{{Daria}}'' {{Urban Legend|s}}. Urban Legend 1950s Jake built a survival bunker, in which 1950s Daria accidentally gets trapped. She doesn't worry too much, until she realizes that the cans in the bunker are worthless since she doesn't have a can opener.
* The ending of the ''WesternAnimation/SouthPark'' episode "Starvin' Marvin" has Kenny's family saying grace over their Thanksgiving dinner, a can of green beans Kenny got for them in the "Canned Food Grab". After that, they realize that they don't have a can opener.
* Happens in ''WesternAnimation/FostersHomeForImaginaryFriends''. The gang is lost in the woods during a camping trip. Coco hatches a ton of eggs, all carrying cans of food and dinner supplies. But she didn't lay a can opener. Don't even bother linking to Fridge Logic.
* This is also the plot of DFE's ''WesternAnimation/TheAntAndTheAardvark'' short "Odd Ant Out". The blue and green aardvarks fight over a can of chocolate-covered ants, but neither of them has a can opener.
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