Video Source: www.youtube.com
Swing starts at 0.58. Watch in HD and full screen! What I love about Rory's swing firstly is his setup-he already looks balanced and solid. Nice neutral spine and straight arms. Hips are dropped back (bum out) with a light knee bend. Shoulders are back (not rounded) chest and head up. Amazing body turn-definitely takes the arm/club unit away with the body. Slight move-maybe 1 inch- into right side but then the right leg remains braced/static and retains same bend as at address (even though knee bend is actually increasing to maintain the same bend because the right hip moves up and behind). Great transition-you can see him clearly squatting -left knee bend increasing significantly and then the left hip moving back behind him to square hips. Weight is neutral-transferred through the left ankle/heel (definitely not transferred to ball of foot). Coming into impact the left leg straightens producing an extra power/speed boost due to centripetal action (body moves up-clubhead must move down). Keeping his right heel close to the ground through impact-it is only pulled up by the hips rotating and pulling with the left side(and not because he pushes off the right side), head remains still well after impact-follow through is awesome with full release and nice rounded finish to match the plane of the backswing. He keeps turning/rotating through impact which helps him achieve that perfectly balanced finish.