If you get a customer or an employee who thinks he's Charles Bronson, take the butt of your gun and smash their nose in. It drops him right to the floor. He falls down screaming. Blood squirts out of his nose. Freaks everybody out.
Nobody says fucking shit after that.
You might get some bitch talk shit to you. But give her a look like you're going to smash her face next, watch her shut the fuck up. Now if it's the manager, that's a different story. The managers know better than to fuck around. So if you get one that's giving you static, he probably thinks he's a real cowboy, so you gotta break that son of a bitch in two.