"Draw the verbs of the figure.  This is where we want to direct our concentration.  Draw what the body is doing, not just the body.  [...]  Here is our [...] line with force and direction.  The one line addresses one idea.  The line starts somewhere, does something, and goes somewhere."—from Michael D. Mattesi in Force:  Dynamic Life Drawing for Animators, Focal Press,2006, p.1-2