Kevin Chen demos on ConceptArt

There is a quite an old thread on the Conceptart.org forums chock full of demo drawings by Kevin Chen. These sketches are amazing, you can learn alot about drawing the figure just by looking through this series. There are 3 pages: Page 1, page 2, and page 3
Kevin Chen is a top figurative teacher and concept artist, there is some of his other work here. I wish I had a teacher like this!