A person's mind is something that can be quite fragile, particularly if the person happens to be [[BreakTheCutie a cutie]] in a CrapsackWorld. The iconic fragile thing in fiction seems to be glass - very shiny and very fragile. This leads to it and its shattering being used as a metaphor for an individual's broken sanity.

A popular variant of this is the HouseOfBrokenMirrors.

[[noreallife]]
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!!Examples:

[[AC:{{Anime}} and {{Manga}}]]
* Occurs during Asuka's MindRape in ''Anime/NeonGenesisEvangelion'' at the end of a repeated montage.
* Played with in ''Anime/YuGiOh'', where the Other Yugi shatters Kaiba's mind after defeating him at the end of the Death-T arc. In this case, it's intended to give Kaiba a chance to ''regain'' his sanity as he puts the pieces of his mind back together.

[[AC:{{Literature}}]]
* One very well-known literary usage is in TheGlassMenagerie, where the glass unicorn's horn breaking off symbolizes [[spoiler:Laura's breakdown upon discovering Jim's engagement]].


[[AC:{{Film}}]]
* One of the most frequent images in ''Film/SuckerPunch'' is a glass breaking, once just before Babydoll's sister dies (From a light source) and the second time when Blondie dies.

[[AC:{{Webcomics}}]]
* In ''{{Narbonic}}'', [[spoiler: Dave]]'s glasses crack near the end, symbolizing [[spoiler: his]] descent into madness.

[[AC: WesternAnimation]]
* ''WesternAnimation/AvatarTheLastAirbender'': [[spoiler:Azula's SanitySlippage culminates in her destruction of a mirror while preparing for her coronation.]] Her real JerkassWoobie persona is revealed in full at this point.

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