What IS that?

If you had a big patch of wooded area just behind your house, and you heard this strange noise coming from it, would you consider moving?

Can anyone identify what is making this noise? People in the comments section of the video claim everything from Bigfoot to someone stepping on a Lego.

Whatever it is it sounds like it's in pain. But what if it's not. What if it's letting you know it's coming to get you?