Join Date: Sep 2011
Location: Germany- but not German =D
Hi and welcome to the forum!
I have a few questions first!
How old is your horse, and how much training?
Have you had his back, saddle and teeth checked recently? He may be speeding up if he's in pain.
If he's a younger horse, it may be an issue of education, and he's not quite understanding you and thinks go is fun!
If he is younger, and providing it isn't dangerous (head up, possible buck or tip over) I would see if you can get the school for yourself, and let him go. He may just need to get over it, get it out of his system and get the initial 'buzz' out.
Some horses get so used to short bursts of canter, they get so excited for it, and go faster.