stolen from flickr
http://www.flickr.com/photos/graffiti_photography/5649552014/
http://www.flickr.com/photos/graffiti_photography/5648991887/
http://www.flickr.com/photos/graffiti_photography/5648950491/
http://www.flickr.com/photos/graffiti_photography/5682209268/
http://www.flickr.com/photos/graffiti_photography/5685471954/
http://www.flickr.com/photos/graffiti_photography/5704882999/
http://www.flickr.com/photos/graffiti_photography/5704883799/