A tale of two bands - The Dandy Warhols and The Brian Jonestown Massacre - "DiG!" was a brilliant product of director Ondi Timoner's access as a friend of both acts. She catches one (the Dandys) on their way up to success that brings new corporate complications and the other (BJM) as they repeatedly flame out, thanks to brilliant but mercurial lead singer Anton Newcombe. So good you won't believe it's real.