Douglas Gordon: the man with the black lagoon

The artist has flooded New York’s Park Avenue Armory and put a pianist in the middle of the water in a dramatic new workWhat better place to flood than New York?” says Douglas Gordon, whose epic water-and-music collaboration with pianist Hélène Grimaud is showing at the Park Avenue Armory.Gordon’s flood covers 28,000 square feet of the drill hall. Sometimes he prefers to call it an inundation. Or a loch. Call it a lake and the Scottish artist will glare at you. On 10 evenings