Those watching the Big Bay Boom in San Diego's Glorietta Bay witnessed what was either an accidental fireworks display -- or a very disappointing fireworks show.
Port District authorities said a "technical difficulty" resulted in all the fireworks going off at once.
About 5 minutes before the show was supposed to start, a sudden burst of fireworks shot into the air near the bay. Throughout downtown San Diego, a large rumble could be felt just before 9 p.m. on Wednesday night.
It appeared that hundreds of fireworks were set off at the same time. The explosions lasted a few seconds.
At about 9:20 p.m., people waiting for the display were told to return home.