You know the sound: It's eerie and echoing, and it makes the little hairs on your arms stand up immediately. So many horror movies use it to create a chilling atmosphere, and even some reality shows ...

Add Yahoo as a preferred source to see more of our stories on Google. Creepy Aztec death whistle Ranging from a threatening hiss to a blood-curdling scream, the sound of the Aztec death whistle is as ...