Wow! I'm glad I saw this one. I was wondering about this myself when I was showing.
When I was first training my paint I had just gotten him to start cantering and my friend and I took our horses to a show out of town. Well, they didn't want to be separated. Her horse is a year older than Hunter so she had a little more work done with hers than I had with mine and she had her slow canter down but Hunter and I just had one speed. (I'm not a fan of the slow canter anyway..) So I was just thrilled that I got Hunter to canter in the ring! He'd rarely do it as he was still unsure... So anyway he was in there givin'er and we got by Erin and Gunther and Gunther wanted to stay by Hunter so he sped up and boy did Erin get mad at me!! I got yelled at lol. But I couldn't help it!