Zing is too broke for this behavior. He has been ridden outside of an arena in the past and has been very good about it. We had planned to take him to the park yet this fall. But with this new behavior we can't take him anywhere until it is (hopefully) resolved.
This is so frustrating for both Kristina and me. She has worked him 4 times a week for over a year and he has been doing really well. If Kristina was an average rider she would have been in real trouble and as it is, she had a hard time staying on and controlling him.
We have a lesson today and we have worked at getting him in the trailer, so I have hope of getting Zing over there. I wish I could just sit down with him and ask him what his problem is.