Glad you are back and OK, Charlie.
I was concerned about your outcome. Being an owner of horses, I know the damage they can do when scared.
I hope the horse is calm now and I am sure the two of you will continue with a good relationship.
For those not familiar with horses, most are Ok around gun shots, but some will react in a very active manner and panic. Many different types of injuries can occur if you are around when it happens.