As gangster Machine Gun Kelly surrenders to the FBI, he shouts out, “Don’t shoot, G-Men!”, which becomes a nickname for FBI agents.

Machine Gun Kelly was an infamous American gangster during the Prohibition era, best known for his involvement in organized crime, particularly kidnapping and bootlegging. His real name was George Kelly Barnes, and he was born on July 18, 1895, in Memphis, Tennessee. He earned the nickname “Machine Gun Kelly” because of his notorious use of a Thompson submachine gun, also known as a “Tommy gun,” during his criminal activities.