Join Date: Oct 2009
Location: SouthEastern PA
When was that video taken? I stopped watching a few seconds after she almost ran out on you. I have a short attention span today.
You need to focus on your body position like some posters said. It can help or hinder your horse while jumping. You legs looked like they were slipping back, if sliped back enough you could be leaning on your horse over 4 foot fences, which effects her balance, and could be catestrophic.
Your horse looks good for lower levels, but for higher jumps you and your horse need to keep practicing. You need to hover up there in a two point, without slipping too far back, your mare needs to learn to tuck tighter.
Both of which can be corrected by what everyone else suggested, lots of grids. Some horses just can't jump over 3-4 feet for that reason, they just can't tuck well enough. I'm not saying your horse can't do it, but don't have your heart set on jumping too much higher, she just might not be able to do it.