John Travolta traveled to Hong Kong to study oil painting in order to prepare for his role in this film.
The same Monet painting - Woman with Parasol , is used in the film Thomas Crown (1999) with Pierce Brosnan.
At about 14 minutes in, Gramps, Will, and Ray are watching a movie on TV. The film is Mort à l'arrivée (1949), directed by Rudolph Maté, starring Edmond O'Brien.