In Terminator 2, when the men knock on the glass door, you can hear the sound of human fingers hitting the glass door. Like a normal knock.
But when the T-1000 knocks on the glass door, it sounds like metal clashing with the glass door. Liquid Metal to be exact. A different sound as if a different material is hitting the glass door.
Subtle details like that are really incredible because most folks watching the film wouldn’t even try to notice that, I know I didn’t but the fact that they got this tiny, minor or the minutest of detail right shows a level of sophistication and passion for creating this film that increases my respect and admiration for this masterpiece which is also why I can tell this is one of the reasons the film was loved by all of us.
Hasta la vista Baby