I like Real Genius. It's not exactly a good movie, and yet, it has attained a certain cult status. The movie is based on Caltech and some of the pranks featured in the movie actually happened in the 1960s and 1970s.

That character who lived in the tunnels, Lazlo Hollyfeld, was also based on a Caltech student who once lived a few weeks in the campus underground tunnels because he needed temporary accommodation or something like that...