"I had experienced absolute freedom--I had felt that my body was without boundaries, limitless; that pain didn't matter, that nothing mattered at all--and it intoxicated me." In 2010, more than 750,000 people stood in line at Marina Abramovic's MoMA retrospective for the chance to sit across from her and communicate with her nonverbally in an unprecedented durational performance that lasted more than 700 hours. This celebration of nearly fifty years...