Jumping Mouse

I know it looks liked I popped her in the mouth on the last jump but I slipped the reins for her. This is me on a 13.3h pony named mouse. I know I'm too tall for her but i'm not to heavy for her. I only weigh 120lbs and she can easily carry my weight. My instuctor put me on her and i'll be switching to a much taller horse soon. I know my jumping is very noobish, and I don't need ANY bitchy riders complaining about my position. Thats why I'm taking lessons!