I did a couple of flights off of a paved area this weekend, and all was going well until I tried to do a loop. It certainly wasn't round, the plane went straight up, then just flipped over, then recovered, but I needed another 6" of altitude. It sprung the landing gear, shortened the prop by about an inch on each blade, tore off the tail skid, and cracked the elevator. I'm thinking I was on the wrong side of the circle relative to the wind. Oh well, it'll fix up easily enough!