Amadeus (1984)

Visible crew/equipment: When Mozart and family visit a parody on several operas of his in a public theater, in one part of the show little people appear from all sides of the stage. When the last of the little people (carrying a model of horse) hops through a paper wall on the side of the stage, you can see a man in jeans walking behind the set.

Wolfgang Amadeus Mozart: My music... they started without me.

Trivia: The producers purposely went with relatively unknown actors for the film, because they thought they'd be more believable than stars who people already identified in different roles.