Pyrotechnics

Pyrotechnics is the science of materials capable of undergoing self-contained and self-sustained exothermic chemical reactions for the production of heat, light, gas, smoke and/or sound. Pyrotechnics include not only the manufacture of fireworks but items such as safety matches, oxygen candles, explosive bolts and fasteners, and components of the automotive airbag.

Pyro is used in many Entrances of Pro wrestlers, various Fireworks, Explosions and other effects happen in most Wrestling Promotions including WWE,TNA amongst others.