A group of professors from the local school of aeronautics were gifted an overnight trip to the nearest city by flight. They were all pleasantly surprised and happily prepared for the trip and boarded the flight. Their air hostess for the day happily announced that the professors would be proud to know that the plane that they had boarded was engineered and built by their very own students. All but one of the professors ran out of the plane. The air hostess was shocked by this lack of confidence in their own students. She was impressed by the professor who had stayed back and went over to congratulate him on his confidence in his students. He replied that he had so much confidence in his students that he knew that the plane would not even start.