This is a very serious problem I need help solving. The owners don't know what to do either. They have tried ( and trust me they are very good ) and the horse ( Yacht ) broke the owner's finger last time she lunged her. So basically, whenever I try and lunge Yacht on a lunge line, it doesn't matter if it's at a walk, trot, canter, etc. She bolts off. I have tried keeping her in a smaller circle and bending her head towards me so it makes it more difficult, and sometimes it works but sometimes it doesn't. So that means she only gets free lunged when nobody is at the barn. She does fine free lunging, she knows to stay in a circle around me but that's less than 2 times a week. I have been thinking about taking her to a Clinton Anderson clinic/tour and seeing if he can help, but that's only if I can't solve it myself.