I brought him in and tacked him up and he was good. When I attached the lunge line he did his squeal/rear thing and I nipped it in the bud. He got down to business pretty quickly on the lunge line with only a few moments of naughty. At the end of the session he explored a new option – going slowly and relaxing. He even did this before he got all the way to completely lathered up. Our boy may be growing up!