Second time lucky

Saw this on a lunchtime stroll today. Seems the graffiti artist managed to spill the paint the first time round, but hey, I'm sure that's happened to all of us at some point (although maybe not when graffiti-ing on a park bench!).

[thanks to [url=http://www.blipfoto.com/paulransom]Paul[/url] for showing me how to get two images onto one canvas in Photoshop)