Seven BILLION dollars. That's not chump change, and it is what Americans spend on Halloween every year... decorations, costumes, candy, all of it.
Sure, it's a party, but it's a party in part about scaring people.
Why DO we like to scream, at least if it's followed by a good laugh? That's the domain of sociologist Dr. Margee Kerr, the rare academic who is considered a "scare specialist."
She shares the findings of some of her research with us... and psychologist David Zald from Vanderbilt University visits to talk about the biological roots of fear.