Watch Waiting Hours in Line For Marina Abramovics 512 Hours
Marina Abramovic, the self styled "grandmother of performance art," might be 67-years-old, but she shows no signs of slowing down. Her latest exhibition, 512 Hours, opened at London's Serpentine Gallery last week to lines so long they spawned their own hashtag on Twitter. For 8 hours a day, for 64 days  a total of 512 hours  Abramovic and her assistants will walk amongst gallery entrants, directing them to various places around the room, and encouraging them to breath, to relax and to heighten their awareness.