Part 1: Mary starts the lesson off with a bounce and some narrow fences in an exercise that has the riders changing the rein. She explains this challenges the riders to work on their steering and turns, as well as demanding they be effective over the fences. Mary gives the riders individual feedback, helping one who gets too forward with her upper body, and another who tends to lift her hands at more technical fences. She explains how she teaches young horses about narrow fences in her own program.