Yawning in a South Africa airport could reap what reward?

Answer: free coffee

by News Staff / August 26, 2013

A coffee machine with a facial recognition system won't let weary travelers at O.R. Tambo International Airport in South Africa purchase coffee. Instead, the only way to get a cup is to yawn, at which time coffee is immediately dispensed. The machine is a marketing ploy for Douwe Egberts coffee, as part of a campaign called Bye Bye Red Eye.