In spite of the variable weather, I've been managing to work in regular rides on Larry, trying to implement the excellent instruction I got from Julie's lessons. Our first show is three weeks from Sunday, but at this point I'm not even thinking about the tests.
Anyway, I was schooling Larry yesterday in trot-canter-trot transitions, when all of a sudden, he threw his nose up, grabbed the bit and bolted down the long side of the arena, adding in a few bucks (not very good ones since he didn't put his head down) for good measure. I will admit that the one-rein stop is not instinctive for me, but self-preservation is, so I stuck with him until I brought him back under control. Then we proceeded to canter 10-15 meter circles for a few minutes before going back to work.
I have no idea what sparked Larry's behavior; he could have seen or heard something that startled him, or just felt feisty and wanted to try something. When you get a horse in poor condition like Larry was when we got him, sometimes you don't really know what you've got until they get some groceries and conditioning and start feeling better!