It's a skull-shaped device you blow into . . . and it sounds like someone screaming for their life.
Have you ever heard of the Aztec Death Whistle? It's a skull-shaped device you blow into . . . and it sounds like someone screaming for their life. It was originally used in wars to scare enemies . . . and also during human sacrifice. By the way, Amazon sells them for about $50. Of course they do...