Momo first became a viral horror figure in 2018, when a photograph of a grotesque, wide-eyed sculpture began circulating on WhatsApp and social media and was quickly turned into memes, creepypasta stories and prank messages. Although the so-called challenge stories were widely debunked, the character stuck as shorthand for an unexpected online scare. Sounds like this one keep that reputation alive, giving creators a instantly recognisable audio cue for jumpscares, pranks and Halloween content without needing any visual explanation.