The shoulders rotating perpendicular to the spine.
If, after a Rotated (Backstroke) Shoulder Turn, the player shifts his weight left on the Downstroke -- a Hip Motion producing a Spine Tilt (lower portion toward the Target) -- then he has used the On Plane Shoulder Turn (10-13-D) and is no longer using the Rotated Shoulder Turn (10-13-C).
Hybrid Mode
