POLO BASICS - Horace Henriot, (white hat) , Polo instructor and owner of Play Polo LLC, , rides Celena, as he gives 16 yr. old Sam Wittmann, a lesson, at the polo field, in Gahanna, Ohio, on Tuesday, Aug. 21, 2013. Sam's horse is Lady Di. (Jack Kustron/Photoj.com for Business First)