Appropriately enough, Forever Young began with the primal beat of Iggy Pop’s “Lust for Life". What I consider to be Mr Pop’s “My Way” seems to perfectly sum up the pumped-up and apparently unstoppable forward momentum of the man himself and his against-all-the-odds lengthy career. But it could just as easily represent many of the world-weary yet resilient musicians interviewed in this unexceptional but nevertheless diverting documentary.