Anatomy flash movies

In my anatomy course at art school we had to do exercises that consisted of putting tracing paper on a photo and drawing the muscles in the right places. This takes alot of practice and is not as easy as it sounds, well it wasn't for me anyway! These flash movies by Rey Bustos are basically the same idea. What I really like is that you can fade them in and out at your own speed, to get a good idea of the positioning and movement of the muscles. He has also made movies of model skeletons on turntables which you can view from all angles, these are useful for sketching poses.