"The Artist is Present: Marina Abromović", which premiered last Spring at MOMA remains one of the best artist's retrospectives I've seen in a while. If you failed to catch it, you're a failure. . . no getting around it.
Thankfully you can catch glimpses online. Recently I re-discovered one of my favorite pieces from the show-- "Balkan Erotic Epic" (2006). I highly recommend this short video in its entirety (13 minutes). Not only is it fascinating, funny, and pretty fucking fantastic, it took FOREVER to load to the blog. Plus, if you want to see bare-ass adult men humping the ground, or Slavic boys with their dicks flopping out of their trousers you'll have watch til the end.