Artist network.tv has samples of their full length tutorials online and on YouTube.
The Artist Network on YouTube
http://www.youtube.com/user/artistsnetwork
Preview and buy full length workshops on their website.
ArtistNetwork.tv
RivenPhoenix – The structure of man. Anatomy lessons.
Learn to draw the human body from your mind, without any reference photo’s.
http://the-structure-of-man.blogspot.com/
I think everyone who draws human or animal forms should buy this. You can either buy a hard copy, or pay and download.
The DVD series contains 227 lessons (!) and starts out with a nice simple stick figure, but quickly moves on the skull and more complicated ‘formulas’. Although the artist’s native tongue is not English, everything is very clearly explained and the pace is great – not too slow, and not too hard to keep up with. And since it’s video you can always go back over a few lessons.
When you’ve finished this, your people will never look ‘run over’ again, and you will be able to draw the human body in any position and from any angle.