How does she sleep in front of all these people?

Over the weekend  MoMA visitors came upon Tilda Swinton sleeping in a glass box.  The performance art is called "The Maybe.”   MoMA spokesperson said  "The Maybe" is "a very unusual case" because the museum didn’t  actively publicize the attraction, which seems to be a key part of the performance.   "There is no published schedule for its appearance, no artist's statement released, no museum statement, no public profile or image issued," the statement regarding the exhibit says. "Those who find it chance upon it for themselves, live and in real - shared - time: now we see it, now we don't."     "The Maybe" will happen periodically through the end of 2013.