Putting the "Street" Back in Street Art

Yesterday my aunt sent me this link to some totally amazing street art. The artist's name is Julian Beever and he uses a technique called anamorphism which creates the illusion of three dimensionality when viewed from certain vantage points (this technique was also really popular in the seventeenth century according to my Art Hum professor). The drawings are done with pastels on completely flat surfaces without any form of electronic aid.
I may be the last one to have heard about this, since apparently he has been doing it for ten years in cities all over the world (the Netherlands, US, UK, Australia, France, Germany, Belgium), but I am posting it anyway just in case.