To drag my point even further into the ground, I conducted a little experiment. The figures in the top sketch are outlined from two photographs. The outlines were pretty basic and I filled in the rest with my imagination. However, what I find very interesting is that all of the markings on the drawing are edits from a tutor. The corrections are purely from his imagination. My point is, when a figure is reference in action from a photo, it will seldom look "correct". This is my main beef with this type of work. Perhaps it's like the Greeks who on purpose, made the lines of the columns not straight in order to look straight. People really don't look 'right' in photos, especially action photos.