When a restaurant leaves a bunch of customer satisfaction cards on the table, most of us simply ignore them. Unless the service was particularly outstanding or particularly bad, that is. Well, recently a diner at the 'Ten Cows' restaurant in Taiwan was able to demonstrate his opinion on the service in a way that was creative whilst also letting management know that he was telling the truth about his experience. The service was so incredibly slow that the talented diner was able to complete this highly detailed Mona Lisa doodle whilst waiting. Check it out!