You are in the closed elevator with the apple. You feel weightless. So you want to know whether you're free falling or in the outer space. Place the apple about a meter away from your eyes. If the elevator is in free fall, the apple will move close to you slowly, but if you're in the outer space the apple will be standing still. Because in free fall elevator, the gravitational force acting on the apple, in small scale, is not parallel to the gravitational force acting on you.