Photo Lesson: Hitting the Forehand on the Rise

Even the classic, linear stroke style has significant rotational energy. From the completed backswing position, where the upper body was roughly facing the sideline, the upper body has now turned 90 degrees so that it's facing the net. This rotational energy combines with the forward, linear energy evidenced by the body weight so fully on the front foot that only the toe of the back foot touches the ground.