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The Big Bang is an event where gang members were sprayed with a radioactive, mutagenic gas intended to act as a tracer. The gas kills most exposed to it and gives the survivors superpowers. The concept was created by Christopher Priest and inspired by urban legends of a chemical-laced soda that sterilizes black people.
In other media
The Big Bang appears in Static Shock. Additionally, Ebon attempts to initiate a second Big Bang on two occasions, but is foiled by Static.