Just a few months ago (at age 26 mind you) he decided he didn't want to walk down a particularly scary barn aisle (his eyesight is going). Our CTJ meeting ended with him spinning like a top, me (being on my game and knowing he may try this) spinning in self-preservation so we were butt-to-butt, and him kicking me in the a$$ while he took off back down the "safe" aisle. I had a beautiful half-hoof bruise on my cheek for a week.
He has learned over the years to pick his battles, so he rarely does crap like that anymore, so when he does do it, he means it. But he does still do something like that maybe once or twice a year. I let him get away with it because of his age and as I said, because he's learned to pick his battles so there may be a good reason that I am not aware of (e.g. the above incident led me to get his eyes checked by the vet).