Banksy shocks art world by shredding £1 mn work at auction

British street artist Banksy has stunned the art world with arguably his most audacious prank yet, self-destructing one of his best-known works moments after it fetched more than a million pounds at auction in London."Girl with Balloon" had just sold at Sotheby's Friday for £1,042,000 ($1.4 million, 1.2 million euros) -- a joint record for the maverick artist -- when it unexpectedly passed through a shredder hidden in the frame.Banksy posted a video Saturday on his Instagram page accompani