We have seen many situations where horses finish the course on their own after losing their rider. These animals are highly intelligent, and if they are well-trained and love their job, be sure that they will make to the end by themselves. This video footage is another example of that.
Seems that the horse from this video didn’t like going through the course with a rider on his back, so he decided to continue without her. He tossed her off and finished the jumps solo. He probably wanted to show that he is strong enough to perform alone, but he didn’t know that he was on a competition. But that’s the funny side of this story. The truth is that that rider lost her balance and could not stay on his back.