when you tell Mario to step to the left by moving a joystick, this
initiates a small delightful narrative: Mario comes across a hill;
he starts climbing the hill; the hill turns out to be too steep;
Mario slides back onto the ground; Mario gets up, all shaking.
None of these actions required anything from us; all we had to
do is just to move the joystick once. The computer program amplifies our single action, expanding it into a narrative sequence.49
