At the core of the shell is a bursting charge with a fuse. Once lit, the bursting charge and aerial shell are triggered to explode. This is the part some who have launched fireworks know well.

Governor Chris Christie, who is extremely unpopular among state residents, signed a bill this week enabling "non-explosive, non-aerial" fireworks to be sold in the state, NJ.com reported.

Another fuse inside the aerial shell — a time-delay fuse — ignites and sets off the bursting charge. Then the black powder and stars are triggered, which causes the rapid production of gas and ...