The sound comes from Quincy Jones's theme for the television series Ironside, first broadcast in 1967, which Quentin Tarantino revived in Kill Bill: Volume 1 in 2003. Tarantino used the wailing opening whenever The Bride's memory or rage was triggered by an enemy, linking the siren to her revenge list. Clips of that moment later circulated on video platforms and soundboards as a standalone reaction, detached from the film. Its instant link to focused fury keeps it popular for edits about rivals, betrayals and sudden danger today.