Employees were setting up the display on an Ocean City beach at around 10:30 a.m. Sunday when an "unintentional discharge" caused the entire set to go off at once.
Video captured the moment when a giant column of smoke shot up from the beach and fireworks went off in the wreck. People watched and recorded the display, which will have to stand in now for the typical celebration.
"Firefighters arrived to find that no vehicle was on fire; however, there was an unintentional discharge of fireworks that were being set up on the beach for the town's fireworks show," police said.
An employee from the fireworks company suffered minor injuries and refused to go to hospital, Fox 5 DC reported.
No one else was injured, according to police.
"Prior to the fireworks being off loaded from the vehicle, fire marshals secure a safe zone around the fireworks and put other safety protocols in place," police explained. "It is this very zone and safety protocols that kept anyone else from being injured."