Jimmy nodded and slowly stood. "Up there, in the roof, there's an ultraviolet light projector that provides the illumination for the grid to show up to our eyes—or, in your case, on the helmet's faceplate. In the case of most jacked hitters, the helmet would interface with the hitter's biosoft and send an impulse that would direct his swing to connect with the ball. In your case you'll get a projection of where the ball will be, but you have to use your own judgment as to when to swing."