Never forget the grand finale to end all grand finales. Back in 2012 a malfunction caused San Diego’s 4th of July firework celebration to happen all at once. What was supposed to be a 15-20 minute show only lasted 30 seconds. At an estimated cost of the mishap was $300,000, or $10,000 per second. Best malfunction ever!
WATCH: That Time San Diego's Fireworks Went Off All At Once...
