It's 7pm, and January. You are sitting in a GM car park, in next year's Cadillac De Ville. The view ahead from the driver's seat extends for 30 m, lit by dipped headlamps — except that just above the car nose, hanging in space, is a small rectangular monochrome negative view of the road beyond the dipped lamp view. In this miniature view, a figure, a white image, crosses the road. Look up and she can barely be seen with the naked eye. Some 200 m further ahead in the hanging view, there is a white image of a jogger clearly running along the verge; look up and he is invisible. The most dramatic image in the black and white view happens as you drive and turn left to find yourself staring at the headlamps of a parked vehicle, 200 yards ahead. All the naked eye can see is glare, dazzle; glance at the image and it is as if the headlamps are off, the glare gone, and you see a man kneeling down in the road changing the wheel on what is probably a Chevrolet Blazer. He is totally invisible to normal sight until we get alongside, beyond the headlamps.
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