Help, my horse has emotional outbursts on the trail

Episode 95-"Is there a way to teach emotional control to a horse? He is super quiet when ridden alone. When ridden in groups I can feel his nerves bundle up and then he broncs." In this episode, I discuss the concepts: why naturally quiet horses can be prone to 'outburst', four places where this issue can be addressed, how cues systems are as much mental as they are physical, and the saying, "Ride your best horse the hardest."