Photo via Twitter

Jay-Z is, at this very moment, apparently posted up at New York City's Pace Gallery, where he's doing some kind of conceptual marathon performance. According to NahRight, he's performing Magna Carta Holy Grail track "Picasso Baby" for six straight hours. (Just like the National-- just kidding-- just like the "Watch the Throne" tour). The whole thing is being filmed; footage will later be compiled for the official "Picasso Baby" video.

He's also got some special guests: According to the Huffington Post, director Judd Apatow and "Girls" actor Adam Driver are among the celebrities at the shoot. Per MissInfo, Jerry Saltz, Wale, George Condo and Marina Abramović (!)-- who might have been an inspiration for the event-- are there, too. Watch a surreal video of Jay with Abramović at Pace Gallery, below.

Watch some Instagram videos and Vines from the event:

Via Instagram user kiamak:

Via Instagram user wil_power:

Via Vine user CEDAR:

With Marina Abramović: