Debbie continues helping the rider with the change because as soon as she changes the bend the horse gives the change.  The complexity of riding a clean change is evident, and Debbie offers her expertise on correcting his balance for a good change. Janet makes the very good point often when a horse makes a mistake, the rider stops them but should use it as training opportunity and keep going.  Janet then explains how the weight aid can be misdirected in the change.