Pig rooting going in to a canter.?

If you dont feel confidant to ride it out yourself then get someone else to ride him and get him back in work... that's kinda your only option. Personally I love the adrenalin and I enjoy a good buck and a bit of pig rooting when a horse is fresh as long as it a feel good response in the horse and not nasty "I'm going to get you off" behaviour :) That's just then getting their balance and having a stretch. You have to have confidence in yourself and you have to step out of your comfort zone to improve. This horse may teach you to improve your balance :)