This sound comes from the film 300, where King Leonidas shouts the line before kicking a messenger into a pit. The movie was released in 2006, and the quote quickly became a major internet catchphrase in memes, remixes, and parody videos. It stayed popular because the delivery is short, loud, and instantly recognizable, making it easy to drop into reaction edits. It often appears alongside other dramatic meme audio such as the Inception Button when creators want exaggerated cinematic tension.