What I love most is seeing how they go about thinking and producing the effects used for computers used by characters in the film! From the films that do it really poorly to the films that attempt something realistic, I always wonder who's in charge of it, how they think about it, what tools they use to create it, etc. For the films in which it's poorly done I always figure it's the assistant FX designer's kid who has 4 months experience in Flash. For the good movies I always wonder if they grab the DB administrator for all the film assets and ask him some nerd questions :)

From the article:

In Tron, the hacker was not supposed to be snooping around on a network; he was supposed to kill a process. So we went with posix kill and also had him pipe ps into grep. I also ended up using emacs eshell to make the terminal more l33t. The team was delighted to see my emacs performance -- splitting the editor into nested panes and running different modes. I was tickled that I got emacs into a block buster movie. I actually do use emacs irl, and although I do not subscribe to alt.religion.emacs, I think that's all incredibly relevant to the world of Tron.

It's utterly fascinating to me that people have jobs like this.