No one blazes a trail of theatrical excitement and thrilling invention quite like the Icelandic actor-director Gisli Orn Gardarsson. Having astonished us with a Romeo and Juliet at the Young Vic in which actors swinging on ropes and trapezes captured that play's sense of sexual elation, danger and restriction, Gardarsson now dreams up a Woyzeck, similarly ablaze with imagistic surprises, trapezes and shocks.