Use when the tackle sets to your inside.
• Assume proper stance and alignment
• When ball is snapped, explode out of stance, stepping forward with ball-side leg; simultaneously extend ball side hand toward tackle’s inside shoulder
• Take second step; when tackle extends outside hand to your outside shoulder, knock it down and out of way with outside hand
• Plant ball-side foot on third step and square hips toward QB

Allen’s advice: Extending your ball-side hand protects your inside number, forcing the tackle to punch with his outside hand.