A large part of the score, including the main title theme, is from Leonard Bernstein's score to On the Waterfront (1954).
In the Wally World amusement park at the end of (the original) National Lampoon's Vacation, one of the rides is named after this movie, The Screaming Mimi.
The dog in this film is the same breed of dog (great Dane) that knocked down Anita Ekberg in her old age, causing her to break her hip, after which she was confined to a wheel chair.