President Bush and U.S. Air Force Academy graduate Theodore Shiveley, from Plano, Texas, bump chests during the Air Force Academy graduation ceremony, Wednesday, May 28, 2008, in Colorado Springs, Colo. (AP Photo/Charles Dharapak)
President Bush strikes a Heisman trophy pose with an unidentified graduate of the U.S. Air Force Academy graduation ceremony, Wednesday, May 28, 2008, in Colorado Springs, Colo. (AP Photo/Charles Dharapak) In this combination of photos, President Bush and graduate Theodore Shiveley from Plano, Texas, bump chests at the United States Air Force Academy graduation ceremony in Colorado Springs, Colo., Wednesday, May 28, 2008. (AP Photo/Charles Dharapak)
解释一下Heisman trophy pose：Stiff-armed pose, based on the Heisman Trophy, given to a suitor or potential suitor with the goal of minimizing or avoiding contact.