The pilot said he was attempting to land on runway 18 "in variable crosswinds with gusty conditions. [There] may have been wind shear or tailwinds involved." He told a Federal Aviation Administration (FAA) inspector that the airplane stalled at low altitude (5 to 8 feet above the runway) and landed hard on the overrun for runway 36. The pilot reported no mechanical issues with the airplane. The FAA inspector reported the fuselage was buckled, the empennage was bent down, and the left wing upper skin was deformed.