The one thing that everybody remembers about this movie is the prostitute with three boobs.
To some people, this is the movie where Arnold Schwarzenegger got ballbusted not one, not two, but three times. By Sharon Stone, no less. He also got another one albeit non-violently by another woman who squeezes his balls softly. See here.
Crosses the Line Twice: The human shield scene. A poor bystander getting caught in the line of fire and shot by Richter's men when they're trying to kill Quaid is horrible. Quaid grabbing his corpse, using it to protect himself from several more rounds of gunfire, and then throwing his now completely bloodied up body onto his pursuers on the other hand? Hilarious.
Evil Is Sexy: Lori, played by the ever-so-lovely Sharon Stone.
An advertisement for Fuji Film is seen in the background of one scene. The film's creators couldn't have predicted that analog photography would be all but killed off by digital photography long before 2084 (the year in which the movie is set).
Quaid decides to have a memory implant of a vacation on Mars as a secret agent instead of as tourist, only to discover he is a secret agent. In True Lies, Arnold Schwarzenegger plays a secret agent whose wife and daughter thinks he is a computer salesman.