As a next step, try thinking of a spiral stretching from the hand being grabbed (for convenience, let's say it's the left), across the shoulders, and around to the other (right) hand. To draw the person toward the left side, try extending the spiral from the right side.
Would this be an exercise to prevent tori to think in moving his left arm, rather than his entire body? And thus focus on the other arm to move, which then off course through the body moves the left arm without putting strength in said left arm? If so, I understand. if not, please explain further.