In an interview with a London newspaper, actor Christopher Walken revealed that he likes to bring a little fun to a movie set by pretending that it’s his birthday.  In the morning, as the makeup crew is preparing him for the shoot, he will act a little sad.  Invariably, some kind-hearted makeup lady will ask if he’s feeling all right.  Walken will mention off-handedly that today is his birthday, but he swears the makeup lady to secrecy.  In a matter of hours, the cast and crew of the movie throw together a big birthday party for him, complete with cake and champagne.  Everyone has a great time, and no one suspects that Walken planned the whole thing just to inject a little fun in his colleagues’ day. (1) 

What a great idea!  Who doesn’t like a party--even if it’s for no reason at all.  In…