The focal point of Matthew Barney’s Hayward exhibition is Redoubt, a two-and-a-quarter-hour film projected on a giant screen that invites you to immerse yourself in the rugged terrain of the Sawtooth Mountains in Idaho The focal point of Matthew Barney’s Hayward exhibition is Redoubt, a two-and-a-quarter-hour film projected on a giant screen that invites you to immerse yourself in the rugged terrain of the Sawtooth Mountains in Idaho, where he grew up. The entrance ticket allows you to watch the film at home, yet while I was there almost everyone stayed the course, which is remarkable given that there’s no dialogue.