This chapter begins with something that's used a lot in this film: blinding white light. It makes things look artificial sometimes. I didn't have a problem with the CGI boxes, but there is a lot of over-lighting and blurring and fog in this scene. Thankfully, it still looks like classic Indiana Jones.
The gun powder floating like dust was a little goofy, but it's nice to know that there is actually some metal in gun powder, as someone pointed out earlier.
I like that Indy shows off his intelligence in this film. (even though it goes overboard sometimes) In this part, Indy is like MacGyver. Give me gun powder... give me pliers... give me shells... He knows how to handle the situation.
There are two great little pieces of music in this chapter. One of them is when Indy climbs up the boxes and drops the shotgun pellets. You can see how much fog and lighting and blurring is used here. I felt like it sort of diminishes the vastness of the warehouse. It doesn't feel as big as it did in Raiders.
Some nice work by ILM here with the moving metal parts. The floating dog-tags are also a nice touch.
Here's the second great piece of music in this chapter. One of my favorites. The music is very much in the spirit of the 1950s sci-fi movie, and so is the metallic covering on the body.
To introduce aliens into the Indiana Jones universe, it must be done subtly. This is the right start. By just showing the hand, the audience doesn't know exactly what it is. It could be a burn victim... a human experiment... an alien... Unfortunately, the mystery is ruined in the middle of the movie. (more on that later)