Douwe Egberts is a Dutch producer of coffeemakers. Direct is a very clever South African advertising agency. Combine the two, and what do you get? An awesome vending machine in Johannesburg's O.R. Tambo International Airport that distributes free cups of coffee to the people it sees yawn.
As the video explains, there's some rather impressive facial recognition software in the machine, which clearly knows when people are yawning even if they cover their mouth with their hands. The video also explains that the machine distributed over 200 cups of coffee... but doesn't say how long it took until someone inadvertently discovered the method to "operate" the machine, but I imagine that first cup was the most satisfying coffee that person had ever had.