This image released by PBS shows choreographer Twyla Tharp from the documentary, “American Masters: Twyla Moves,” premiering on March 26. (Stick Figure Films/PBS via AP)

This image released by PBS shows choreographer Twyla Tharp from the documentary, “American Masters: Twyla Moves,” premiering on March 26. (Stick Figure Films/PBS via AP)

This image released by PBS shows choreographer Twyla Tharp from the documentary, “American Masters: Twyla Moves,” premiering on March 26. (Herbert Migdoll/PBS via AP)

This image released by PBS shows choreographer Twyla Tharp instructing at Pacific Northwest Ballet in a scene from the documentary, “American Masters: Twyla Moves,” premiering on March 26. (Marc von Borstel/PBS via AP)