Dressage is the equine sport of performing patterns and maneuvers in an arena. There are set tests that each horse and rider must complete, and they are scored subjectively by judges. One off-shot of this sport is called musical freestyle in which the horse and rider complete a list of required maneuvers, but in an order of their own choosing and set to music.
Yesterday, a sensational mare by the name of Blue Hors Matine was euthanized after tragically breaking her leg while out in a paddock. Here is video of her 2006 World Equestrian Games Freestyle Final, one version of which has been viewed nearly 10 million times on YouTube. I found this video (which is clearer than the YouTube version) on a different site. Ever if you don't know anything about horses, just watch how this mare dances, especially at the end. An absolutely fantastic performance from an amazing mare!