Renowned choreographer Alexander Ekman ( ''A Swan Lake'' ) collaborated with his favorite filmmaker T.M. Rives to create a short dance film for the San Francisco Dance Film Festival’s ninth annual festival. The result, a wonderfully whimsical, and at times deeply philosophical, guide to movement as told by Ekman and his friends, dancers Sarah Cecilia, Britt Juleen, Nathaniel Moore, and Ben Nee...