Picture this:
Alice and Ben are trapped in a panic room and Carl is having a nervous breakdown, Ben finds something sticking in a wall, a red box saying: "In Case of Crisis within a panic room, break glass."
Naturally Alice and Ben oblige and break the glass with the tiny hammer.

Two different events can happen at this point:

The thing inside the glass is just what Alice and Ben were looking for to have Carl calm down. The panic attack within the panic room has been averted. And there was much rejoicing.

Or, the thing turns out to be totally useless, but it doesn't stop Alice and Ben from using it anyway. [[MacGyvering Somehow]]. And it either works or just makes the situation worse.

Has nothing to do with [[InCaseOfBossFightBreakGlass breaking glass sections of a boss enemy to destroy it]].
!!In case of examples, read below:


[[folder: Literature ]]

* In ''Literature/SonicTheHedgehogInCastleRobotnik'' after a power-cut Sonic and Tails are stuck in an Elevator and after ages of trying to prize off the emergency hatch with their hands they notice a box with a spanner in it designed to remove the bolts fixing the hatch closed.


[[folder: Live Action TV ]]

* In the BBC {{Edutainment}} series ''Jigsaw'', the [[HotLine O-Phone]], which was used to summon incompetent superheroes The O-Men, was in a glass case labeled "In Emergency Break Glass". There was no hammer. The way to break the glass was to open the case, use the phone to smash the glass, then put the phone back before using it.


[[folder: Tabletop Games ]]

* In ''TabletopGame/MagicTheGathering'', FlavorText for Boros Cluestone: "In case of fire, treachery, citywide riot, political upheaval, or worldwide societal collapse, break glass."


[[folder: Video Games ]]

* In ''VideoGame/IcarusNeeds'', a key needed to progress is found in a box with a sign next to it that reads as follows: ''Break Glass In Need of Key''.
* ''VideoGame/ThiefII'' features an [[YeOldeButcheredeEnglishe amusing variant]]: "In time of peril, breaketh glass."
* ''VideoGame/ZorkGrandInquisitor'' has a glass case marked, "In case of adventure, break glass." It contains a sword, map, and hammer. You can't just take the sword and map; you have to open the case, take the hammer, close the case, [[ExactWords break the glass]], ''then'' take the items.
* At the very beginning of ''VideoGame/{{Unreal|I}}'' there's a glass box with two medpacks inside of it below the end of the Vortex Rikers level, with the "Break Glass" text above it.


[[folder: Web Comics ]]

* ''Webcomic/{{Spinnerette}}'' once showed such a box in the background of Dr. Lambha's lab, labeled "In case of [[CuteClumsyGirl Heather]], break glass".
* According to xkcd Blog/WhatIf ''[[http://what-if.xkcd.com/48/ Sunset On The British Empire]]'', the interior walls of Buckingham Palace have numerous 'In Case Of Emergency, Break Glass' boxes. [[SpotOfTea Each one has a cup of tea in it.]]


[[folder: Western Animation ]]

* In ''WesternAnimation/EdEddNEddysBigPictureShow'', the Eds are trying to find a way out of Eddy's Brother's room when this happens:
-->'''Ed:''' Look! ''(showing Edd and Eddy a red box)''
-->'''Edd:''' "In Case of Movie, break glass"?
-->'''Eddy:''' Bingo! ''(breaks the glass with the tiny hammer'') My bro's always prepared! ''(proceeds to reach for...a peanut; Eddy starts looking confused)'' A peanut?
-->'''Ed:''' [[SelfDeprecation Cheap movie.]]
** Fortunately, the peanut contained the key to Eddy's Brother's car, which the Eds promptly used to escape from the Cul-De-Sac. Sort of.
* ''WesternAnimation/LooneyTunes''
** DoubleSubverted in ''The Hardship of Miles Standish'', John Aldin (played by Elmer Fudd) finds a glass case reading "In Case of Indians, Break Glass". He simply lifts the glass up and takes out the gun behind it...''then'' he breaks the glass.
** In ''Kitty Kornered'', Porky takes out a gun from behind glass when he thinks he's being attacked by martians. He [[LampshadeHanging lampshades]] it by asking who put it there.
** And again in ''Bewitched Bunny'', when WesternAnimation/BugsBunny finds himself cornered by Witch Hazel in her house, he finds a conveniently-placed wall-mounted box labeled "MAGIC POWDER" with the glass front reading "IN CASE OF EMERGENCY BREAK GLASS" complete with a little hammer on a chain attached to it. Bugs uses it, revealing a sort of small bomb or grenade which he hurls at Hazel, turning her into a female rabbit!
* In the ''WesternAnimation/FamilyGuy'' episode "When You Wish Upon a Weinstein", when a group of nuns get word of Peter entering a synagogue, they rush toward a case reading "In Case Of Heresy, Break Glass" and smash it to reveal rulers behind it.
* In ''WesternAnimation/TheSimpsons'' Treehouse of Horror V, Homer goes insane after being forced to go a long time without TV or beer. Marge runs across a glass case that says, "In Case of Spousal Insanity, Break Glass", where she finds a baseball bat.
* An episode of ''WesternAnimation/CatDog'' has the titular character travel into an exotic land to suddenly steal the throne from [[CorruptCorporateExecutive Rancid Rabbit]]. Rancid goes back to a case that says, "In Case of Emergency, Break Grass".
* In the ''WesternAnimation/ReBoot'' episode "Nullzilla", Phong has an extended CrazyPrepared-plan for a godzilla-sized null monster ramapging through the city. This includes a large weapon in a case that reads "IN CASE OF GIANT NULL MONSTER THREATENING CITY -- BREAK GLASS".
* In the ''WesternAnimation/CasperTheFriendlyGhost'' short "Ghost Writers", there is a glass case at the Paramount cartoon studio reading "In Case If You're Fired--" [[BlackComedy and containing]] [[DrivenToSuicide a gun]].