Incredible street drawings

People paint for a variety of reasons, and some of the painters can be extremely gifted. Can you visualize somebody painting on the street in such a way that, when viewed from certain angles, it seems that a three-dimensional object is actually there on the street ? For example, you can think that blocks have been removed from a street surface, that the street is full of garbage or rubbish, or a small boat is sailing on a small water puddle on the street. Interested, well take a look:
http://www.rense.com/general67/street.htm