These pictures are placed such that they are best viewed by looking "through" the pictures rather than going crosseyed.
The crosseyed technique will reverse the placement of the images causing the 3-D effect to look a little strange. For example, the piece of the chair just behind his should will appear as if it should come "forward" instead of being behind him.
it's so funny, once I "see" the 3D image and then blink, my chin always twitches, lol I wonder if there is some sort of neural connection. This one is really easy for me to see, great job