Cool experiment! It works especially well if you substitute a face for an optical illusion poster (http://www.popartuk.com/g/l/lgpp0906+cogs-twisting-cogs-mind-

Cool experiment! It works especially well if you substitute a face for an optical illusion poster (http://www.popartuk.com/g/l/lgpp0906+cogs-twisting-cogs-mind-warp-illusion-poster.jpg http://www.popartuk.com/g/l/lgpp0906+cogs-twisting-cogs-mind...) In all seriousness, it seems to lock onto that poster quite often.