Lightning during a thunderstorm or the effect created by the water hitting a cliff? 

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The sea exerts a powerful appeal over men which is incontrovertible.

The sea keeps on changing, moving and creating uncontrollable shapes on the shore. This makes it hypnotical for man and recalls unexpected images.

In this photograph, the rough sea creates shades, lights and glimmer effects which give the illusion of flashes of lightning during a night thunderstorm.