So tell us the big joke, then  The enigmatic works of the great
Spanish sculptor and showman Juan Muñoz amuse and unsettle in a
welcome retrospective  Juan Muñoz: A Retrospective Tate Modern,
London SE1; 24 January until 27 April  Spanish artist Juan Muñoz
died suddenly of a heart attack on a hot August day in 2001. He
was 48 and at the height of his powers. The obituaries rang with
incredulity that such a vivid spirit could possibly be gone, but
the shock was also unexpectedly real for anyone visiting Tate
Modern that summer.  Muñoz had transformed the Turbine Hall as
no other artist before or since into a parallel world secreted
between two floors. At the bottom of the building, in a Stygian
gloom pierced only by shadows falling from tenement wells above,
a secret service of grey-suited figures performed an enigmatic
drama in a network of balconies and corridors: an unforgettable
embodiment of purgatory.  But as you rose higher up Tate Modern,
all trace of what you had seen mysteriously disappeared. Lifts d