Star Wars: Empire Strikes Back (comments during the movie)

Image: The Robot Maria from Fritz Lang's Metropolis

We started the movie and Luz first asked a question about why C3PO was gold and we then came to an agreement that he was actually made of brass most likely because brass would make a harder shell to contain the wires and internal skeletal structure while keeping a good polished finish that we see on him. Despite this agreement on the metal, the particular color choice from the director for brass is most likely to single him out from other protocol droids. The empire's protocol droids (which are the only other apparent protocol droids in the movie) are a silvery color which can be seen from viewers as a "standard" for today's basic stainless steel and the brass gives C3PO a unique look and as gold vs. silver, a more elite look.

Another interesting comment that Luz made was that the Empire reminded her of Hitler, and as far as I know the Empire's costumes were actually designed to resemble the Nazis' but I'm not entirely sure.

Luz screams when Luke loses his hand

I think it's slightly notable that Luke so quickly accepted Vader as his father when he is in space and on the Millenium Falcon and that he even addresses Vader as "father" when they are speaking through the force before R2D2 fixes the hyperdrive and they take off.