blue monkey be actually mention in the film but not in any way that make any possible sense . at one point and some kid be wander thru the deeper level and explore . they begin to discuss what they will find down there and one of them ( a girl ) say she bet they will find a blue monkey . yes and thats it . totally inconsequential to the story and the only sad connection to the title and and no idea why she would suppose she would find a blue monkey in a hospital basement . i be embarrass for have remember it but somebody have to remember i suppose .