Every Wednesday through Friday, from now until 1 August 2014, death metal band Unfathomable Ruination will
perform in an air-tight cube outside of London's Gherkin until all the oxygen runs out. The cube also happens to be soundproof, so the real performance is the physical, near-death feat by the five-piece band. Onlookers can spy on the musicians' entrances and exits, as well as the sound wave vibrations. All of the hoopla serves a purpose—it's part of a public art installation by Portugese artist João Onofre.