The Big Bay Boom spends about half of its $1 million budget on fireworks alone. Photo courtesy of Big Bay Boom SAN DIEGO – Twenty-six years ago, Sandy Purdon ignited the first annual Big Bay Boom as a personal project. Today, it’s the largest Independence Day fireworks show on the West Coast. “I always get a tear in my eye when I watch the show, even though I know what’s coming,” Purdon said. “It’s a pretty good country we live in.