Investigators say 19-year-old David Walker of Pulaski, Pa., was conducting the show around 9:30 p.m. when a shell malfunctioned, causing an explosion on the ground.
The blast destroyed the containment bunker, sending wooden debris flying, hitting Walker.
He was taken to St. Luke's Hospital in Quakertown where he was pronounced dead.
The coroner says the prelminary cause of death was neck trauma. However, a final determination won't be made until toxicology results come back in six to eight weeks.
Walker worked for Zambelli Fireworks International out of New Castle, Pennsylvania. Police believe the company has worked with the borough for years and never had a problem until now.
The fireworks staging area was isolated from the general public and investigators say the public was never endangered.
No one else was injured during this accident.
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