The Huffington Post reports:
Banksy stunned the art world this month with the partial shredding of his “Girl With Balloon” artwork moments after it sold at Sotheby’s auction house in London for $1.4 million. But a new video that the guerilla street artist shared to YouTube suggests the stunt was slightly botched. “In rehearsals it worked every time,” a note reads — before showing a painting being entirely shredded by the hidden device. At Sotheby’s, however, the spray-paint and acrylic on canvas only went halfway through the shredder.