At 10:50 Pacific time, an experimental Glasair 1 RG struck utility lines and crashed south of Temecula. The pilot and his passenger were killed. A witness said the aircraft was performing a series of aerobatic maneuvers. He described the airplane as pulling up, rolling and then diving until out of sight. At the bottom of each dive he heard the engine accelerate and the airplane would begin another climb. During the final maneuver, he did not hear the engine accelerate nor did he see the airplane climb again following the descent.