Use a gun, go to jail. Even a water gun.

Michelle White was sentenced to 15 years in prison Friday for robbing a White Castle with a water pistol.

Prosecutors said White, 33, drove to the burger joint, handed a threatening note to an employee, while brandishing a plastic pistol, according to KWGN-TV.

When the employees ran to the back of the restaurant, White squeezed through the drive-thru window and stole more than $600,” Asst. Circuit Attorney Melissa Giliam told KTVI-TV.