Plane versus Train

Shanghai to Beijing is two hours by plane or five hours by high-speed train. But with long check-in and air traffic control, the gap becomes closer. So we had a race home. Greg took the train, the rest of us flew. He cheated a bit by leaving early, but we got through security quickly, boarded on time and then... sat on the tarmac for an hour. His gloating text messages proved a point as he beat us by 30 minutes.