Upnover, I think you made an interesting point about riders posing to "stay out of the horse's way". Of course, they are really interfering, by throwing off the horse's balance, leaning so far forward. My trainer tells me to stay out of the horse's way over the jump, but she means for me to stay centered and follow the horse's motion, not jump ahead. Even though it may not cost you in the show ring, posing is not correct riding and shouldn't be taught. If the rider is on top of the horse's shoulder, how can the horse properly use his hind end?