"Making 'Achtung Baby' was the reason we're still here now." So says a contemplative Bono at the tail end of the trailer for 'From the Sky Down,' a new documentary about the recording of U2's seminal album which opens the Toronto International Film Festival on Thursday night. Glad you made the album, Bono! But will 'From the Sky Down' offer something other than expected 'Behind the Music'-like platitudes and foggy nostalgia?