This could be the start of the scariest horror movie you've seen in a long time, but it's worse because it's actually real life. 

At first we thought he sounded like an idiot doing an impression of an emergency siren that you would have heard during an air raid but then we heard the response and even though we're watching the action through a screen, we got properly freaked out. Turns out coyotes are a lot scarier in real life and they're not getting ACME anvils dropped on them. And the end of this could not be more ominous.

Via YouTube