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Choh MaLop/Chahng Geng (Stance Pivot/Grab/Throat Spade)
Turn the left hand over without losing Bridge Contact and convert the hand to a Lop Sau thumbless grab. As the stance pivots halfway to the left and the right hand passes between the two upper Dummy arms to strike with Chahng Jyeung at throat-level to the White Strike Pad the left hand pulls on the dummy arm.
Use a pivot of the shoulders to add snap to the motion and keep the Lop elbow on the Immovable Elbow Moving Line.