Star Wars Episode III: Revenge of the Sith DVD Review

"Naturally, Lucas' collaborators are there to comment on technical aspects of making the film. Like this: Mt Etna erupted while they were filming, so Lucas sent a photographic team to Italy to get footage. So the big lava sequence in the movies finale uses computer graphics, scale models and a real volcano. There is no commentary from the studio accountants on this use of the petty cash. And, of course, there are Easter eggs." Source: nzherald.co.nz