Part 2: Dorothy works with the riders as they tackle the fences. She makes subtle adjustments to their position while thoroughly explaining the biomechanics behind how the rider and horse's bodies interact. She shares some of the techniques she herself uses, including what she calls the bow flex, which helps bring horses back into shape over fences. The riders jump down a difficult line with some trouble. Dorothy reminds them it's okay to make mistakes and to throw a fence if needed to get back in the game.