They look like regular prints to me, also, with the light coming in from the right.
Now if you imagine the light is coming in from the left, it can definitely change the effect.
Now they're levitating!surely if the light was coming from the left side there would be shadow like in this image (i used my awesome photoshop skills )
http://gallery.me.com/ledixon/100017/feet/web.png?ver=12475184510001
You will need to walk across the other side of the room to see the illusion on this one.
First one says, 'Stop wasting your time' 'Get a life'I have two staring ones here...
You have to stare at these so your eyes go blurry to see the illusion it produces. Enjoy!
That one produces words...
And take a guess what this one is too:
Try moving way back from the screen and squint a bit and the faces swap places.