Originally Posted by Cheval
He's probaly doing this because you let him get away with it once or twice, and now he knows. He might be testing you - that's just an option (of so many) of what could be happening.
Start on a 20 meter. Get a nice trot, give a half-halt, "pick up the bit" (I don't know if your aware of that technique). If he gallops, sit deep and circle smaller (as JDI said). Use your voice, and sponge the rein. Remember that one rein is stronger then two. Also, keep him focused by getting an inside bend.
I don't let him get away with it...I'll try to stop him, I'll do half-halts, I'll make him turn abruptly, sitting abnormally deep in the seat, pulling back on the reins...everything I can think of to try and either slow him down or stop him.
I've heard the term "pick up the bit" but I'm still unsure of what that means. I keep him collected as much as I can when we are trotting or cantering.
I will use one rein if he doesn't respond...what we were taught to do is that if the horse bolts or whatever and doesn't respond after you've tried the regular methods of trying to stop, is to put both reins in one hand, reach down close to the bit (but not too close) and pull that one hand back so the head is "ripped" (as my instructor called it) to one side. It seems to slow Sonny down a little bit, but not much. Usually it will slow him down into a extended canter or whatever it's called (slower than a gallop, but not as slow as his regular canter), and then he does forward with his head side ways.
I, myself, can handle him doing that, I've galloped before with horses (once before I got him) so even though I get freaked out at first, I can ride through it and be able to stay on (usually haha)...but I let some of my riding friends ride Sonny also, and I don't want him to do that on them.
It could be he's testing me, but he only does is occasionally...not each time. I'd say he does it ever other, other time.