The many pictures of ?

I've been checking out the news bulletins for the organisation I'm currently doing work for. What's tickled my fancy today is that whatever the story, there appears to be an appropriate picture of the individual on hand. Fun stories get a smiling picture and the opposite is also true.

So I figure that when the photographer is taking the snaps, which I presume this is some time BEFORE it is actually used, the subject must be asked to provide a series of expressions. I wonder to what extent this goes.

Is there a call for "startled" or "look it's a puppy" type expressions?