Thankyou you have made me feel better! I couldn't get back on him unfortunately as I was in a lot of pain, landed right on my tail bone. He wanted trot down a slight hill and a was pulling him back a little as I didn't want him to just trot whenever he felt like it! Maybe this is what annoyed him? Will get back on when back has healed and hope he doesn't try it again! Thanks for the reply
Yup, sounds like he was ticked because he didn't get his way, just like my gelding was yesterday. Luckily, I was already braced for going down the rocks and I ride in an Australian stock saddle, so the poleys kept me in the saddle. Just be glad he didn't jump/buck off a granite boulder like my boy did (only about two feet from the top of the boulder to the trail where we landed, but rocks and trees on either side).
Hope your back heals quickly so you can get back in the saddle again.
Also, next time he goes to trot when you don't want him to, instead of just reining him back (like it sounds like you did), try one-rein stopping him. Reining him back (especially if you're direct reining) can let him grab the bit and run with it, so he can either take off on you or buck, like he did. If you one-rein stop him, he has no choice but to either go in little circles until he decides to stop or stop from the first like you asked him to. Either way, he can't grab the bit and do what he wants.