Richard Tuttle, Walking on Air, C3, (2009) Cotton with Rit dyes, grommets, thread 2x panels, overall installed: 1ft 11 inches x 10ft 4.75 inches/58.4 x 316.8 cm, Photograph by Kerry Ryan McFate, courtesy Pace Gallery, Image © Richard Tuttle, courtesy Stuart Shave/Modern Art, London and Pace Gallery, New York