A group of videos that show body mechanics. As a matter of fact they're the best I've seen. They're SCA videos but the foundation is the same.
Part 1:
http://www.youtube.com/watch?v=RDCdHvaP ... re=related
Part 2:
http://www.youtube.com/watch?v=gDXGTSBh ... re=related
Part 3:
http://www.youtube.com/watch?v=eAH5xj73 ... re=related
Part 4: This is kind of a summary of all the videos.
http://www.youtube.com/watch?v=ZVHlqUhD ... re=related