Looking at the picture, who do you see? Clearly you know. Step 4 meters back from your chair, a new face will appear! Brilliant! P.S. Found the picture while surfing around, let me know what you have to say about it.
Do you have your eyes open? First look away from the screen for a few seconds, then look again! 8 meters is too far away. Somewhere between 3-5 would be ideal.
Hum... I don't get it then. I saw it the first time I looked at it. Maybe we should wait for someone else to reply, or am I the only one seeing it?