So a Cruper teaches you how to buck eh?

The horse that only bucked like a little rocking horse, back and forth, like a little ship on the ocean, has learned how to buck for real.  I put a super cruper on him to get him to loosen up his back end, and what do I get?  I nast horse that tries to bronc me right out of the arena!  Oh yeah, he was nasty!  Cow kick, hop curl... BUCK!  Nothing like he used to do... no, I don't know where it came from!  I didn't know he had it in him!  Lucky for me, I have velcro on my butt, so I stayed right in the saddle.   And I eventually won the fight, and he finished his ride off real nice like :)  Still having the cut in problem when I go to the left.  The bad knee just cant support his girth and push him out.  :(