Sasha Milam, of Richmond, Mass., and her horse, Playing Hookey, clear a jump in the Open Speed Stake class at the 13th Annual Mystic Summer Festival Horse Show at the Mystic Valley Hunt Club in Gales Ferry on Saturday. Some 200 horses were registered to compete during the four days. Proceeds from the event, which began on Thursday and ends today, will benefit the Lawrence & Memorial Hospital Neonatal Intensive Care Unit.