no he acted up solo when a truck would go by. He would not want to stand still to the point where he would pop up and do small rears. He is better when you keep him moving; however, he still calls to the other horses and is not focused. Which I thought was he was afraid and wanted to run away from the car. He did semi-follow a truck back to the barn this fall which made me think that he was getting into racing mode and felt he had to run towards the car. He was even this energy intense when in hand near the road. He has spent the last few months out a pasture right next to the highway. I guess he has figured out that cars can go past and he does not have to worry.