Here's a guy demonstrating how to exploit a loophole in McDonald's menu. He used one of the video kiosks to order 10 burgers, priced at one dollar each. Then he customized the burgers by removing the beef patties from the order, which knocks $1.10 of the price of each dollar burger. Then he added one more dollar burger to the order, but kept the meat this time. The total price for the 10 patty-less burgers and one regular burger was zero dollars.