Sherm Cohen has posted a series of links to various pieces by the great sports cartoonist Willard Mullin on his Cartoon Snap! blog.
This reminded me of some scans I have of Mullin's work which have always seemed to me to indicate that had he wanted to Willard Mullin could have been a great animator.
These are excellent to study for cartooning in general, but animation in particular. This is what I'm always harping on when I tell my students to "push the pose , push the line-of-action" in animation.