For Whom the Bell Tolls Master of Puppets Enter Sandman VIDEO QUALITY: Excellent HD TV broadcast. DVD VERSION: Pinwis SOURCE: MASTER > DVD TIME: 20 minutes CORRECT SHOW: Yes FLAWS: None. BAND PERFORMANCE: Metallica makes an appearance at the The Concert for Valor benefit concert honoring the courage and sacrifice of our veterans, active duty military members and their families. Short set, as there were other bands for the show. However, it's nice to see them pull out Bells and the full version of Master of Puppets.