Freefalling off the side of a horse galloping 30 miles an hour? Call it a trick, if you like, but trick riding is more about athleticism, communication, and nerve. With a heaping dose of showmanship thrown in. Saddle up with Iowa sisters Abigail and Meishja Petersen as the Wild Riders astonish the crowd at the Wapello Rodeo. Photographed and produced by David Peterson for The Iowan.