This skill is performed from a run and a hurdle (skip-step).  The gymnast lunges forward, placing the hands on the floor.  The back leg drives upward, overhead, forcing the back to arch, and the other leg soon joins it in the air.  The gymnast, now on the hands, pushes through the shoulders, and, keeping the back arched, springs into the air momentarily, until the feet reach the ground.  In this skill, the gymnast must keep the head back, arms overhead, and back arched.  Many coaches emphasize “blocking” or pushing through the shoulders.  Many coaches also demand straight legs throughout, even in the landing.