All animations are courtisy of Kinetic Imagery Productions. Check out Gymworld for more. Most gymnasts have a tendency to cast back and not up. Work a lot of casts. With spots, without spots.
Work casts with good form.
Be sure to also work cast handstand and lower back to the bar, because the negative motion will strengthen the cast. Swing handstand on P-bars with good technique will help improve cast handstands. Wrap a therapy band or surgical tubing around the base of very sturdy equipment, such as beam, vault, or bar base. Lie on back and grasp the band or surgical tubing. The feet should be closer to the base than the head.