Fire marshal Tom Kaufman told The Durango Herald that the friction from the electric grinder could have ignited the mixture.
He says the teen had read online about how larger fireworks could be made from smaller ones.
Teen hurt in coffee grinder fireworks blast
DURANGO, CO
Police say the incident happened Monday when 19-year-old Sean
Michael Ogden of Durango was trying to break down fireworks he had
purchased so he could turn them into larger fireworks. The blast
shook the house of a fire inspector who lives about a quarter-mile
away.
