I think it is safe to say that we all recognize former US President Bill Clinton and former US Vice President Al Gore when we see them. In this picture Bill Clinton is in the forefront while Al Gore is standing behind him. Or is he? If you look again at the two figures more closely you will see they both have the same face and that they are in fact both Bill Clinton. This optical illusion is achieved because the figure standing behind has an Al Gore style haircut so at first glance your mind thinks one of them is him.