The only actual incident from Carlotta Monti's book that was used in the movie was when Monti sprayed a hose on W.C. Fields' tin roof to simulate the sound of a waterfall.
The red Pacific Electric interurban rail car (1058) seen in the film had in reality been rescued from the scrapper and was fitted with an internal-combustion engine, rubber tires and a steering mechanism. It appeared in several period Los Angeles-area films, but this movie shows it off to its best advantage. In a happy twist of fate, in 2001 it was refitted with its historic steel wheels and electric traction motors and controls to operate on a new rail line serving San Pedro, CA.