Good Lord
Ok, this is too cool to be expressed in words (well, almost):
http://www.impactlab.com/modules.php?name=News&file=article&sid=7567

That is a 2d drawing, the pavement is flat and both of his feet are on it.
Here's what it looks like from the other side:

Click on the link above to see a forum post about him, or click on the images to go to his page. Yowza. (Stolen from Andrew Sullivan.)
http://www.impactlab.com/modules.php?name=News&file=article&sid=7567
That is a 2d drawing, the pavement is flat and both of his feet are on it.
Here's what it looks like from the other side:
Click on the link above to see a forum post about him, or click on the images to go to his page. Yowza. (Stolen from Andrew Sullivan.)