Here's the first one I saw, a couple of years ago: http://www.youtube.com/watch?v=Yp1wUodQgqQ http://www.youtube.com/watch?v=Yp1wUodQgqQ Linking it here becau

Here's the first one I saw, a couple of years ago: http://www.youtube.com/watch?v=Yp1wUodQgqQ http://www.youtube.com/watch?v=Yp1wUodQgqQ Linking it here because I just went searching for new examples, and none of what I found was quite as good at fooling my brain that living creatures were crawling out of the muck...