I wish I had a photographic memory, too

Stephen Wiltshire, an autistic Londoner artist blessed with a photographic memory (the ability to recall any image perfectly, down to its smallest details), is undertaking a 20-foot panoramic sketch of New York City, from nothing but the visual memory of his one-time 20-minute helicopter flight above the Manhattan skyline. I can’t find any larger images, but you get the idea (tantalizingly):

Neat-o.