At about 13:00 Pacific time, a Cessna 182S was damaged during takeoff at French Valley. Neither the pilot nor the flight instructor/examiner was injured. The pilot was practicing short field takeoff procedures for his trips to Mexico. He said he made a short field takeoff from runway 18 (though he described a soft field takeoff) and the instructor suggested he level off and land on the remaining runway, which they did. They then made a second takeoff from a full stop at the beginning of the runway. The pilot said the tail tie down ring and tail cone dragged the runway at rotation and the airplane pitched up so steeply that he gave control to the instructor. The instructor yelled, I dont have control. The airplane rolled off onto the right wing then quartered forward onto the left wing and nose.