Descr1: 1. A person rides a horse down a hill
  2. The horse lifts its fore legs and is positioned vertically
  3. The horse continues running in the air
  4. The horse is positioned normally again
Descr2: 1. The player is riding a horse down a mountain trail
  2. The horse stands upright on its back legs as it runs down the trail
  3. The horse collides with a snowbank on the side of the trail
  4. The horse stands back on all four legs