Demonic Bunny Retro Poster

This is a Retro Poster using a bunny that appears to be demonic. Sadly, I didn't come up with that idea, the blending mode caused the effect by itself.

Here's the link for the tutorial:

http://design.tutsplus.com/tutorials/create-a-wicked-worn-vintage-pop-art-design--psd-279

Here are the original pictures: