You're walking through your favorite Halloween haunt. Eerie creaks and moans surround you.

You feel a chill--and have a sense that you're being watched.

Suddenly, a ghostly figure looms in front of you. You scream.

At that moment, you're probably NOT thinking of what's happening with your body's neurochemicals.

But that's one area of Dr. Margee Kerr's expertise.

As a sociologist, haunt consultant, educator and author, Margee has done extensive research on the science of fear.

So much so that she traveled the world for two years, researching her book Scream: Chilling Adventures in the Science of Fear. In the process, Margee explored, first-hand, some of our most common fears.

Fear of heights, fear of ghosts and the ultimate one--fear of death--are among the areas which she covers.

In this edition of Over Coffee®, we talked with Margee about the science behind the scares, how to apply her findings from Scream to creating an effective Halloween haunt, and some points to keep in mind to make that scare fun-scary.