The 'If You See Another Person That Looks Identical To You, Run Away and Hide' meme originates from the popular analog horror series 'The Mandela Catalogue' by Alex Kister. This specific warning is a key element of the series' lore, instructing citizens on how to survive encounters with 'Alternates'—malicious, shape-shifting entities that mimic human forms. The phrase captured the internet's imagination due to its eerie, minimalist aesthetic and its appeal to the 'uncanny valley' sensation. Beyond horror circles, the template is frequently used to joke about meeting a twin, finding a celebrity lookalike, or even encountering a version of oneself from an alternate timeline, blending genuine dread with modern internet irony.