Linda said "It's easier to send the horse away, more difficult for them to come to you." She also said "Moving the hindquarters will cause the horse to draw to you." Practice driving the hindquarters by:
(1) starting at 1/2 way down the lead rope, and the horse faces-up.
(2) Walk a wide arc around the horse using the mother-in-law look (scowl); don't get close to the shoulder or you'll drive the shoulder away.
(3) Keep horse faced-up to you with hindquarters moving away.
(4) If horse doesn't move the hindquarters, use the carrot stick to firmly encourage the hindquarters to move.
(5) At this point of the exercise, if you're staying on a loose lead, and the horse is moving the hindquarters as asked, when you stop asking for the movement, and you stand still, you should see the horse take a step to you (or at least you should notice that he wants to). Several of the students at this clinic took a step toward the horse at this point which stopped the forward movement of the horse.
(6) Finally, when all of the above is working well, when the horse is correctly facing up as you ask the hindquarters to move, proceed to back up combing the rope. This combination of movements should be nice and smooth with no leaning on the halter by the horse. You want the horse to be saying at this point "Oh, you wanted me to come to you!"
Remember to scowl when asking for the back-up and smile for the draw. Also belly button out for backup and in for draw.
"What you're looking for is a backup/draw that is respectful with impulsion."