"Twisty" Image Distortion

Tonight I have been playing around with some (more) image manipulation, this time, distorting part of the image, and putting it back onto the canvas.

Take a look, and you'll see the illusion that's created. The main script (and image) was "borrowed" from a rather heavy piece of code, which I then tweaked and changed, so that the code, and output would work on the CODEF HTML5 format!

So, what I'm trying to say is that it's NOT my code, I've just played around with it at length in order to get it to work! :-)

http://codef.namwollem.co.uk/twisty.html