LOS ANGELES (AP) — A thunderstorm formed so rapidly over a Southern California beach that experts said Monday it was impossible for anyone to predict a lightning strike would turn a day of carefree fun into one of terror. The phenomenon so rare that lifeguards lack an emergency warning system struck Sunday afternoon at Los Angeles' popular Venice Beach, killing a 21-year-old man and injuring a dozen others. Along the beach, famous internationally for its jugglers, skaters, medical marijuana dealers and boardwalk preachers and hucksters, panic instantly set in. Killed was Nick Fagnano, 21, who was scheduled to attend the University of Southern California's Sol Price School of Public Policy in the fall as a transfer student from a nearby community college. On Catalina Island, the picturesque Channel Island 26 miles west of Los Angeles, the man struck on a golf course was listed in stable condition. The result was a ferocious lightning strike and thunderclap that set off car alarms, showered the local lifeguard station with sparks and shook the building.