Part 2: Boyd sets up a line of two fences and asks the riders to jump them in a shorter five stride and a longer four. He explains that the first fence is critical in establishing the distance and works with the riders to create a shorter stride to be able to add, or a longer stride to get there in less. Some of the riders make the mistake of trying to add by pulling back on the reins at the firs fence. Boyd works with them to instead shorten the canter and deliver the horse to a deeper distance in order to add. He reminds them that more forward they are in the saddle, the more likely they'll influence the horse to be longer and more strung out.