Except for where she made him run at the end and he bucked, he didn't seem too bothered by it (not anymore so than your average green horse). It's not very often that you see a cow thrilled about much of anything (unless it involves pancakes... I know a steer that would die for a stack of pancakes. Never seen a cow so happy in my life as when he's munchin on his flapjacks)
I think it would be fun to try, but I wouldn't want to be the one training the thing to do it.