Marina Abramović and Ulay. Imponderabilia. Originally performed in 1977 for 90 minutes. Galleria Comunale d’Arte Moderna, Bologna. Still from 16mm film transferred to video (black and white, sound). 52:16 minutes. © 2010 Marina Abramović. Courtesy Marina Abramović and Sean Kelly Gallery/Artists Rights Society (ARS), New York. Reperformed continuously in shifts throughout the exhibition Marina Abramovic: The Artist Is Present at MoMA, March 14-May 31, 2010.