What a beautiful horse Casper is, lookes like Arabian? If the horse has got Arabian in him then that could be one reason why he's so hotwired lol. Then again you also said he was lazy too lol. I think he is gorgeous, I don't ride english either, but it sounds to me like it would take alot of time and patients to train this horse away from the bad habits it already has. The whole problem lies with his owner letting him get away with all this stuff.

Who knows if you could ride him enough maybe you could rid him of those bad habits.