Well it was a big boom. San Diegans gathered for the “Big Bay Boom,” the annual Fourth of July fireworks spectacle Wednesday night but were treated to a disappointing show when all of the fireworks exploded at once. “It shook the whole building. I thought it was a bomb or someone was shooting everybody,” said one spectator visiting San Diego from Kansas. “Car alarms, every kind of noise came on. It was really unexpected.” The crowd at the San Diego bay went quiet, confused as the sky went dark while “Proud to be an American” and “Born in the USA” blared on.