This Banksy painting "self-destructed" just moments after selling for more than £1 million. Just after the hammer went down, the painting was shredded, thought to be by a remotely activated mechanism within the frame. The prized work then came out the bottom in strips.
If a work is damaged while in the care of an auction house, a buyer would not normally be expected to go through with the purchase.
But perhaps, now known as the subject of one of the greatest pranks in the art world, Girl With Red Balloon will be worth even more in its shredded state. https://www.theguardian.com/artanddesign/2018/oct/06/banksy-sothebys-auction-prank-leaves-art-world-in-shreds-girl-with-balloon?CMP=fb_gu