Trail foot lifts up. Trail leg bends. Trail leg stays bent. Top hand, shoulders, hips and trail foot are in a straight line and pointed past the box. That line is past a 45 degree angle.
Trail foot drives down towards the box.
Trail leg straightens. The body gets full extension. Top hand, shoulders, hips and trail foot are in a straight line and pointed at the box. That line is at a 45 degree angle. Feet and legs come appart.