Owling - What is it?

I've said it before and I'll say it again, the internet is a strange place!
You may remember a post I did a few months ago about a craze sweeping the internet called planking, (you can read the post by clicking here).
In essence you had to lie down as stiff as a plank and then up load a picture of your self doing it to a site such as Facebook to share with all your friends. The weirder the place you did it in the better. Well this craze has now led on to a new internet fad called owling.

Planking - Have you tried it yet?

I'm normally pretty good with internet fads, being right there at the front when they start, but I''ll admit this one passed me by a bit so if you've already heard of it my apologies for todays post.
For those of you that haven't 'planking' a variation on an old game called, imaginatively, the lying down game, is the latest craze to be sweeping the internet.
But just what is it?