A person or group of people place a large order of hamburgers from the McDonald's drive-thru menu. Then, after they have paid for them, the driver looks away (preferably placing a wallet or pocketbook in the passenger's seat). While the driver is looking the other way, another person dressed in a black striped outfit runs by the window and grabs the bag of hamburgers from the McDonald's worker. Then the driver asks for his money back or another order, and the group successfully doubles their order of hamburgers.
My friends and I were starving, so we decided to use the hamburglar.