Remember that Continental Airlines flight that had an emergency landing after its pilot died in the cockpit? According to this article, a passenger (who flies Cessnas) helped to land the plane. Well, "helped" is probably going a bit far. He sat in the cockpit and helped with the radio and checklists. The best part, though, is that the co-pilot who was landing the plane had gotten on the PA and asked if there was a pilot on board. Which sounds like a scene from Airplane, but actually happened. Oddly, nobody freaked.