Spectators watch from Coronado Island in San Diego as a malfunction causes the entire Fourth of July fireworks show go off all at once, Wednesday, July 4, 2012. The Coast Guard says the mishap occurred minutes before the scheduled opening of the Big Bay Boom show. More than 500,000 people witnessed the short-lived spectacle. No injuries were reported. (AP Photo/The U-T San Diego, James Gregg) MANDATORY CREDIT: Photo by James Gregg U-T San Diego; NO SALES, NO ARCHIVING, SAN DIEGO COUNTY OUT, TV OUT, MAGS OUT, FOREIGN OUT, TABLOIDS OUT, AP IMAGES OUT, COMMERCIAL INTERNET USE OUT.
SAN DIEGO (AP) — The San Diego Trolley was packed. Hotel rooms facing the bay were sold out. And local radio was set to simulcast a patriotic score for the Fourth of July show.
But instead of 20 minutes of fireworks, the crowd in San Diego got about 20 seconds of giant, deafening booms after a computer mishap sent multiple bulb-shaped explosions over the bay.
The show's producer blamed a "technical glitch" Thursday, saying an error in its computer system caused tens of thousands of fireworks on four barges to go off simultaneously with a single command.
"It was like a giant, serious bomb went off," said Mike Newton, 29, a photographer who watched from a friend's 28th-floor apartment. "That's what it looked like and felt like. It hit you right in the chest."
There were no reported injuries and Garden State Fireworks, based in Millington, N.J., apologized and vowed to determine precisely what went wrong. The 122-year-old company produced hundreds of other shows across the country Wednesday night.
August Santore, part-owner of Garden State Fireworks, said the company felt terrible, but the mood was unforgiving among many of the hundreds of thousands of people who witnessed the explosions before they could get off their first "ooh" or "ah."
A patriotic score was set to be simulcast on a local radio station. The show was set to stream live on the Web.
The crowd stood in quiet disbelief, with many wondering what just happened to a show billed as the Big Bay Boom. Word went out on the radio about 20 minutes later that it was over.
Bre Nelson, a 26-year-old wedding planner, watched from a hillside street packed with "tons and tons of people and cars."
"It was really neat to see the entire sky light up but then we just waited there," said Nelson. "Everyone was just sitting around."
By late Thursday afternoon, the fireworks flop had become a hit online with about 2 million views of the footage on YouTube.
Sponsors contributed about $380,000 to host the show, said Sandy Purdon, owner of a bay marina and the chief organizer. The Port of San Diego contributed $145,000 as title sponsor, with hotels and restaurants giving much of the rest.
The port district gave an additional $50,000 worth of services, including traffic control, portable toilets and cleanup.
The fireworks cost $125,000 and the barges and tugs cost $45,000, Purdon said. After permits, publicity, buses and other costs, there was about $50,000 left, which was earmarked to help young military families though the San Diego Armed Services YMCA.
The port district said in a statement that it was "very disappointed" in what it described as an apparent technical error.
It was unclear if anyone will get reimbursed. Purdon, who witnessed the explosions from his home with his sponsors, said he had discussed with Garden State Fireworks the possibility that it foots the bill for next year's Fourth of July show.
Garden State Fireworks has staged pyrotechnic displays for the 1988 Winter Olympics, the Statue of Liberty Bicentennial Celebration and New Year's Eve in Central Park in New York.
"We are a good strong company, and we rely on technology. We'll take the ridicule as long as no one was injured," Santore said.
The debacle will likely fuel a long-running controversy in San Diego about damage that fireworks displays inflict on marine life. Environmental attorney Marco Gonzalez has repeatedly challenged shows that take place over water, inviting ire and ridicule from critics including San Diego Mayor Jerry Sanders.
Gonzalez recently prevailed in court decisions but decided against trying to block this year's show in La Jolla Cove. Still, organizers of a fireworks show over San Diego's Lake Murray canceled this year's show, saying they feared a lawsuit.
"The notion that fireworks are critical to Independence Day celebrations has just been blown out of proportion with these large shows," Gonzalez said.
Associated Press writer Sue Manning in Los Angeles contributed to this report.