French artist Abraham Poincheval prepares to go out of a 12-tonne boulder where he was entombed for a week at the Palais de Tokyo on March 1, 2017 in Paris. The artist made headlines worldwide when the two halves of the rock closed around him on February 22, 2017 at Paris's Palais de Tokyo art museum. Poincheval, 44, had carved out a hole inside the rock in his own image, just big enough for him to sit up in, with a niche to hold supplies of water, soup and dried meat. / AFP PHOTO / JOEL SAGET / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read JOEL SAGET/AFP/Getty Images)
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AFP JOEL SAGET

French artist Abraham Poincheval performs "Pierre" (Stone), at the Palais de Tokyo on February 22, 2017 in Paris. Poincheval was entombed on February 22, 2017 inside a 12-tonne boulder for a week, saying: "I think I can take it." With the world's press looking on, the two halves of the limestone rock were closed on Abraham Poincheval by workmen in a Paris modern art museum. / AFP / JOEL SAGET / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read JOEL SAGET/AFP/Getty Images)
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AFP JOEL SAGET

French artist Abraham Poincheval performs "Pierre" (Stone), at the Palais de Tokyo on February 22, 2017 in Paris. Poincheval will perform "Pierre" (Stone), during which he will live inside a rock, from February 22 to March 1, 2017 and "Oeuf" (Egg), during which he will sit on eggs until they hatch, from March 29, 2017 at the Palais de Tokyo in Paris. / AFP / JOEL SAGET / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read JOEL SAGET/AFP/Getty Images)
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AFP JOEL SAGET

French artist Abraham Poincheval performs "Pierre" (Stone), at the Palais de Tokyo on February 22, 2017 in Paris. Poincheval will perform "Pierre" (Stone), during which he will live inside a rock, from February 22 to March 1, 2017 and "Oeuf" (Egg), during which he will sit on eggs until they hatch, from March 29, 2017 at the Palais de Tokyo in Paris. / AFP / JOEL SAGET / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read JOEL SAGET/AFP/Getty Images)
Getty Images

AFP JOEL SAGET

French artist Abraham Poincheval performs "Pierre" (Stone), at the Palais de Tokyo on February 22, 2017 in Paris. Poincheval will perform "Pierre" (Stone), during which he will live inside a rock, from February 22 to March 1, 2017 and "Oeuf" (Egg), during which he will sit on eggs until they hatch, from March 29, 2017 at the Palais de Tokyo in Paris. / AFP / JOEL SAGET / RESTRICTED TO EDITORIAL USE - MANDATORY MENTION OF THE ARTIST UPON PUBLICATION - TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read JOEL SAGET/AFP/Getty Images)
Getty Images

AFP JOEL SAGET