Horse bolts during gymkhana game

When I'm going to get the flag during a gymkhana race, Jake gets spooked and gallops off. It looks intentional but he was actually spooked and only calmed down once I dropped the flag. PLEASE NO CRITICISM. I was holding the reins in one hand so it was a little difficult to control him in a gallop and I had to keep turning him into circles to calm him down. No worries...