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Surveillance video of a holdup at a California 7-Eleven has gone viral because of the security guard’s sharp comeback to a pair of teen robbers.

The incident occurred last month in the Los Angeles County city of Gardena.

Two hooded teenagers, at least one of them apparently holding a handgun, leap the counter at the convenience store and order the cashier to open the register.

They must not have noticed the security guard outside.

The cashier backs away, hands in the air, and the guard storms in, brandishing his weapon.

The audio is clear: As the guard begins shooting, one of the teens cries out that he’s not armed, saying of his weapon, “It’s fake!”

The guard gets off one more shot and then says, “Oh, well. Mine is real.”

Gardena police say both of the teens survived the shooting and the guard faces no charges.

This story was revised to clarify the order of events: The guard begins shooting before the robber says his own weapon is fake.