The electron transitions caused by elements absorbing energy from combustion are more impressive than colored smoke bombs.

“The electron transitions that give rise to the color of fireworks are, at least in my opinion, way cooler than colored smoke bombs.”

High density polyethylene mortars are the preferred material for professional fireworks because they are designed to split rather than explode if a shell malfunctions.

“And that particular material is meant to expand and split from the energy of a malfunctioning shell versus explode and throw shrapnel everywhere.”