The picture above was taken in a drawing class at the University of Colorado, Denver on the topic of, Gesture Lines. (Here's a better shot of the drawing)
The other artist shown was, "Luis Jimenez", who I know from his, "Mustang" sculpture near the airport - a sculpture that took 16 years to complete and actually caused his death, while he was working it. Thirty two feet of sculpture, falling and crushing you.