One of the names on Ruben's building directory is Lars Ulrich, This is the name of the drummer and founding member of the American heavy metal band, Metallica.
One of the names on Ruben's building directory is Fox Mulder from the X Files.
Roger Jackson plays Detective Riley in this film. In Scream (1996) he plays the voice of a psychopathic killer who attempts to kill Deputy Riley (David Arquette)