When Arthur Honeycutt enters Specks' dorm room, Specks offers him a Coors beer. Prior to 1981 (the film is from 1979), Coors beer was available only in eleven Western states - not in Virginia, where the film is set. See more
A "McGuffin" is a term coined by the world's foremost teller of suspense stories to label that secret, elusive, mysterious something that everyone in the story is trying to find or find out about. It is, in effect, the pretext of the plot; the catalyst that brings the characters together and causes them to act or interact - the vial of microfilm, the money, the missing papers, the murderer, the motive, the single reason that causes the entire story to happen. Usually, there's...