Continuity mistake: As Garp is being placed aboard the helicopter, the rotor motor can be heard spinning, but there is no downdraft affecting the people in the scene.
The World According to Garp (1982)
Directed by: George Roy Hill
Starring: Robin Williams, Glenn Close, John Lithgow, Jessica Tandy, Mary Beth Hurt
Trivia: Even though Mary Beth Hurt and Glenn Close played women from different generations, in reality they are only a year apart in age.
Trivia: The man who plays the part of the wrestling referee is John Irving. He wrote the book on which the movie is based.
Trivia: This was Glen Close's first movie (not counting TV work).
Jenny Fields: You know, everybody dies. My parents died. Your father died. Everybody dies. I'm going to die too. So will you. The thing is, to have a life before we die. It can be a real adventure having a life.
Jenny Fields: Are you gonna go to sleep or you gonna stay up and think your weird thoughts?
Young Garp: I'll stay up and think weird thoughts for a while.
Answer: The book makes it pretty obvious that there are a number of factors: 1) She caught Garp and her sister in the middle of things. 2) Garp hurt her dog. 3) She actually hated him from the start and it just got worse.