I thought about that too but I rode him three days before this in the same state park and rode for almost three hours on rough trails and he was great. I know that the small tree is what originally made him react with the lunging forward and am guessing maybe once I fly out of the saddle it causes him to buck til he gets away from me. Since he naturally isn’t a spooky horse it surprises me he reacts the way he does when he spooks. I can handle a quick jump to the side but when he decides to buck like a bronco before I have time to get my reins tight I am on the ground. I did get a little 2 y.o. POA this past April and him and Romeo are constantly rearing and messing around so not sure if that has anything to do with it as far as being out in the back. I just think if he was I’d notice other signs of discomfort. My mare last year wouldn’t buck but I could tell something was driving her crazy and she didn’t know what to do with herself. The first 30 mins of our ride she was fine and then boom, you could tell something was irritating her, she’d shake her whole body, would try to lay down and roll while I was on her. I’d get to the top of a hill which normally she goes down carefully and straight and she’d turn completely sideways or refuse to go down with me on her. I did have a chiropractor out and she adjusted her and she was fine after that, she never did try to buck me, you could just tell something was bugging her and she didn’t know what to do with herself. Maybe I’ll try to get ahold of that gal and see if she can work on him maybe that does have something to do with it. Thanks for replying, I appreciate it!