In appreciation of their hard work during the school year, a group of professors were invited to sight seeing flight that was leaving from a nearby airport.

When the doors closed and the plane was about to take off, all the professors were informed that the plane had been made by their students. All the professors rushed toward the plane doors, trying to escape and survive - with the exception of one professor who remain seated with a look of confidence and calmness.

Someone's asked him why he wasn't escaping the plane.

The professor answered confidently, "They are our students."

He was then asked, "Oh, are you sure that you taught them well?"

Professor replied quietly, "I'm Sure it won't fly."