It follows the gentle curves of the glassy Osterfjord, so still as to reflect perfectly the scudding clouds above.

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The moon is full and the clouds scudding across its surface cast blue shadows on the snow.

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In the meantime, San Diego so sunny and prosperous on the surface carries on, with families strolling through Balboa Park and weekend sailors scudding across Mission Bay.

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Although the races attract hundreds of thousands of spectators, most of them snatch only brief glimpses of the noisy four-wheeled inverted aeroplanes scudding around the tarmac, their aerofoils upside down to glue them to the track rather than lift them off a runway.

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