Haha the horse I was riding during my lesson started throwing little bucks when I gave him a kick to get him cantering faster. He like bucked, went over a jump, then bucked a little more. It was very interesting.. and kinda fun at the same time. My instructor just kept yelling sit back, sit back! I rode through it and kicked on, not letting him get away with his nasty little tricks haha. I must say, for a horse in his mid 20's he's still got plenty of spunk left!