Ok so its not urban but it is sort of digital and a fascinating movie displaying the techniques of stop frame animation and blue screen to mask out the background for effective visualisation:
The movie was created using a FUJI FinePix S3 PRO camera and AfterEffects 6.5 to extract the background/insert the shadow, final editing was carried out using Premiere 6.0.
Take a look at Nariomaru on YouTube for more info.