Trivia: When they go into the police station, just before Robert Patrick walks out Sharon Stone walks out in her Basic Instinct outfit. Another nod to the "movie within a movie" concept.
Trivia: When Danny is being shown Jack Slater IV,it states that its a Franco Columbo film. Franco Columbo is one of Arnold's friends from his bodybuilding days, back in the 70s/80s.
Trivia: When Jack and Danny go inside the police station the first time, Danny notices Robert Patrick coming out of the station. This is a nod to Terminator 2: Judgement Day.
Trivia: When Charles Dance is turning pages on his newspaper, you can hear a Predator "growl" in the background. (00:21:25)
Trivia: Danny Madigan is watching a Road Runner cartoon at his apartment. There are several subsequent references to "Acme" throughout the movie afterwards, to say nothing about the fact that there is a cartoon cat as a cop. (00:11:25 - 00:31:25)
Chosen answer: The kid points them out in the film, in order to convince Arnold's character that he inhabits movieland. Also, after Arnold's character falls into the tar pit he is able to completely wipe himself clean, an obvious intentional continuity error.