Great Rider! But I think every one who wants to jump shouldnt be dependent on there stirrups IMO. When I first learned how to jump I had to do it bareback so I could practice on balence, and position.My trainer said if you were in a show and you lost your stirrups you would at least be prepared because, I started out with no stirrups, people who only jump with stirrups are usually all over the place and unbalenced if they loose 'em.
But she did really well sitting those bucks! I think I would have been on my butt after the second maybe first haha