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.
Visible crew/equipment: Mozart is composing The Requiem Mass when Constanze admits a late-night caller. The door she opens reflects a large, bright square of light that looks like a sun-lit window (only it's night) - or more likely, a studio reflector. (It's definitely not the burning candles. Wrong shape.).