Stockton, Calif., police said two gun-wielding men walked into the fast-food restaurant Thursday and demanded cash from a clerk, KOVR-TV, Sacramento, reported Tuesday.
A second Burger King employee snuck out the restaurant's back door and saw the suspects had left their getaway car running, police said.
Police said the worker jumped into the car and drove it around the corner.
"I haven't heard of any employee actually leaving a business, getting inside the suspect vehicle and trying to hide it," Stockton Officer Joe Silva said.
Silva said the suspects, identified as Gabriel Gonzalez and Jeremy Lovitt, fled to a nearby field, where they were arrested.
"The quick action from this employee did allow our officers to get on scene and arrest the suspects," Silva said.