Horror movies are renowned for their spine-tingling sounds and eerie background music that send shivers down our spines. From the ominous creaking of a haunted house to the unsettling whispers in the dark, these sounds are meticulously crafted to evoke feelings of panic, dread, suspense, and discomfort. But have you ever heard of the Aztec death whistle? Brace yourselves, because this might just be the scariest sound you’ll ever encounter, all produced by a whistle.

[Via Neatorama]