TILDA SWINTON has made many edgy career and clothing choices, but the pale Scottish actress' performance as part of the Museum of Modern Art’s presentation of “The Maybe” may be her most far out.

On Saturday, the Oscar winner (for her role in the George Clooney vehicle Michael Clayton) climbed into clear box — outfitted with a mattress, a pillow, bedding and a bottle of water — and slept all day as museum goers looked on.

Swinton first performed this piece was in 1995 at London's Serpentine Gallery and a year later at Museo Barracco in Rome. She is expected to perform it several more times on random days throughout the rest of the year.

According to a statement by MOMA, "An integral part of The Maybe's incarnation at MoMA in 2013 is that there is no published schedule for its appearance, no artist's statement released, no museum statement beyond this brief context, no public profile or image issued. Those who find it chance upon it for themselves, live and in real-shared-time: now we see it, now we don't."

The performance has caused a stir the Twittersphere, prompting comedian Patton Oswalt to tweet, “I'm Tilda's agent and I'm on the phone with her now. I just read this to her and she said 'I'm in!'"

Playwright David Lindsay-Abaire joked, "A family of tourists got lost on their way to MoMA and spent an hour at Port Authority watching a homeless guy sleep in a box."