In a "director's cut" video posted to Banksy's YouTube channel yesterday, a caption reads "In rehearsals it worked every time" before footage of a canvas being completely shredded is shown. If this was Banksy's real intention, it's not a huge surprise it went awry. The artwork was allegedly given to its previous owner back in 2006, so 12 years is a long time for a built-in shredder, batteries and radio to sit in wait for a one-time use. But Banksy is a clever guy -- surely he'd have thought of that? Plus there are already rumours that auction house Sotheby's was in on the entire thing. Perhaps, then, he's making a point about the obsolescence of technology versus the permanence of art? Or maybe he just wanted to screw around -- you never know with Banksy.