I bought a book a few weeks ago at Borders in Portland called "Facial Expressions - A Visual Reference for Artists". Its filled with men and women's facial expressions. Models from 18 - 90 are asked to expess all sorts of emotions like furious, or sly, or evil, or surprised, well, you get the idea. I think this guy was concentrating in an exagerrated way. It's a great reference book for drawing the face in a different way than I usually do.