well, that´s a mental agility´s test. In this picture we can find something that makes that picture be impossible. at the beggining can be a bit difficult, but you can find the error in 2-3 minutes, i guess, if you can do it more quickly you are really fast!!!!!! use headphones or increase a bit the speakers volume because each minute aproximately you will can receive a sound hint for make the work easier (anyways is not too evident) well, thats the link, have flash format, maximize the window to see better the details and... CONCENTRATION good luck. http://www.silueth.com/files/flash/whatswrong.swf
