So yesterday it was nice enough (today, believe it or not, it's snowing) that I put Magnum in the round pen for a bit of a "romp." Apparently Magnum does not know the meaning of counterclockwise ... whenever I tried to get him to go that way, he would walk toward me and stand, as if to say, "I don't wanna run anymore, can't I stand here and look pretty?"
Eventually I got him trotting counterclockwise a couple of times, and even cantered as well!
Here are some pictures of my big boy...