The death whistle is a clay whistle associated with Aztec culture in Mesoamerica, known for producing a sound that resembles a human scream rather than a traditional whistle tone. Modern recreations are often recorded for horror films, haunted attractions and online videos, where the unsettling noise signals danger or death. The clip spread through short-form horror edits, prank videos and Halloween compilations, and it remains popular because listeners instantly recognise the scream-like quality without needing any visual context or explanation.