This is a simulation of how a spark caused by static electricity can easily ignite a gasoline container that is not properly grounded.
Static Electricity definition:
Static electricity is caused by an imbalance of electric charges within, or on, the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge. Static electricity is named in contrast with current electricity, which flows through wires or other conductors and transmits energy.