It is not intended to lead your horse around while walking backwards. This is an excellent exercise for a few minutes before riding to focus your horse. Notice that Budha raised his head in order to re-balance and stop. Also, I am about three feet in front of Budha and I will keep that distance by stepping back until he stops. I'm working Budha in the Labyrinth, this time with a saddle.
Many horses change their balance and ability to bend around the corners after they are saddled.
Put the halter over the bridle and attach the chain in the usual way. This procedure helps the horse become familiar with the bit before being ridden with it. However, during the ground exercises while the horse is wearing the rollerbit, you often will notice a change in self-carriage, balance, and use of the back and the hind quarters. Riding through the patterns of poles is fun for you and you horse and provides another opportunity to work with balance and coordination and to improve fine-motor skills. You may need to change the distances or heights of the patterns in order to make it successful for your horse.