Same here Smrobs...of course, I retrain horses that have issues like that, or bucking, bolting, etc...sometimes, especially if the horse has just learnt that flipping out brings the response they want, making sure they don't get that response can make a huge difference. When a horse pulls like that, they HAVE learned that they can get free that way, whether it's because they bust their equipment or someone unties them. Put a neck rope on, or use an inner tube on part of the tie, and let the horse figure it out for himself. This is where having the high line can help a bit more, because he can circle and pull all he wants, but there's no fencing or posts for him to get caught on.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."