Saw a case on a flight from HKG to PEK on a Chinese airline. They asked the offending passenger for his boarding pass. He said he had lost it but insisted he was in business class. The crew finally gave up arguing and the passenger sat down smugly in business class. When we arrived in Beijing the police came on board and frogmarched him off the plane. The look on his face was priceless and not smug at all anymore....
