This is a crash prevention article for planes figured out during study of religion. The falling velocity of a red apple is slower than that of a plane and thus, Newton who measured the universal gravity and weight of the red apple finds out that since the plane is overwhelmingly heavier than the apple, the universal gravity G is proportional to product of masses m and m' of both objects, and is in inverse proportion to the square of distance r. Thereby, when Eve being a lady of ancestor took out the apple aggressively without winding, she was dropped on Garden of Eden meeting with god's anger. Since the mass of the apple is found out by learning, the universal gravity G of the plane and apple becomes totally zero. Accordingly, a safety flight can be enjoyed by getting on the plane while having one of apple without gnawing. In this regard however, it is necessary to previously check the fuel amount and strength of the plane, and is recommended to avoid boarding ina time of disaster.