Zep's 1976 film The Song Remains The Same, a companion to the live album of the same name, is based on performance footage from New York's Madison Square Garden. But it also features several out-of-concert "fantasy sequences" for each of the band members, as well as for manager Peter Grant and tour manager Richard Cole. "There are similarities [to The Song Remains The Same]," Ulrich reveals in the latest issue of Classic Rock.

"There are four members in Led Zeppelin, four members in Metallica, it's a full-length movie, and there's a lot in this film that does not take place onstage.