Annabella Sciorra initially had no desire to appear in the film, thinking that it would be too intense and sad. A read-through with Robin Williams convinced her otherwise.
The title is derived from William Shakespeare's "Hamlet" (Act 3, Scene 1): "To sleep: perchance to dream: ay, there's the rub; For in that sleep of death what dreams may come When we have shuffled off this mortal coil must give us pause..."
The original prints of the film, which were stored at a video vault in Universal Studios Hollywood's backlot, were lost in the June 1st, 2008 backlot fire.
One of a few films shot on Fuji Velvia (RVM) film stock. Velvia is a type of film used most frequently for still photography of landscapes and other subjects because of its very high color saturation. It is only rarely employed for cinematography, usually when special effects are required.
When Chris goes to the city in Heaven where people are flying around, watch for characters from "Peter Pan" (Wendy, Michael, John) and "Mary Poppins" (Mary Poppins) among the people flying. Robin Williams starred in Hook, where he played Peter Pan.