Jim, a 42-year old engineer was teaching his eight-year-old son how to fly a radio-controlled airplane. As the airplane was taking off, Jim instructed his son to push the control stick on the radio to the right. He did and the airplane turned to the right.This was repeated several more times until the airplane turned full circle toward the son, ready to land. “Push the stick to the right,” said Jim. This time, however, the plane turned left. “Push the stick left,” Jim said. Now the plane turned .