During a plant operation intended to destroy 500 g of pyrotechnic materials, the combustion mode transitioned to detonation, causing the metal basket (underneath which the products to be destroyed had been placed) to unhinge and be projected. The confinement of such products would have caused this transition to detonation. Flying debris in turn sparked bush fires in the vicinity, but these could be quickly extinguished by personnel thanks to the onsite presence of a fire truck involved in burning operations. The operator replaced the protective basket with an anti-spattering system attached to the burning zone and furthermore adopted measures to avoid the confinement of materials scheduled for destruction.