Suicide Mouse began as an internet creepypasta about a supposedly lost Mickey Mouse cartoon, in which the cheerful character walks silently through a bleak landscape before the footage breaks down into distortion. Shared through creepypasta forums, blogs and YouTube, it became one of the most retold stories in early internet horror, helped by its use of a familiar childhood figure in an unfamiliar, unsettling context. The scream at the end became its most recognisable moment, and editors still reuse it today because it instantly signals that something innocent has turned deeply wrong.