Trivia: In the scene where Arnold meets his lady partner before getting on an airplane, she asks him where he is from and he says Austria, which is where he really is from.
Trivia: In most of Arnold Schwarzenegger's films he usually says the phrase "I'll be back." In this film, towards the end when he decides to be a teacher, he says "I'm back."
Trivia: When the cop is looking for the little kid, he runs into the kid's room, and his pillow and bedsheets are "Ghostbusters" themed. The director of this film,Ivan Reitman, directed "Ghostbusters."
Answer: Because he's being abused by his father. As explained in the movie the father beats him and his mother as well. So she has to lie about Zack's black and blue marks. In one scene the mother explains Mr. Kimble that the father is undergoing therapy. He says that if it happens again he will report it. As Zack shows bruises again, Arnold's character goes out and beats Zack's father.
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