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The experts explain it this way: When our caveman and cavewoman
ancestors perceived a threat, like a saber-toothed tiger on the hunt,
they had two choices: flee or fight. For either option, they needed to
channel their strongest and most agile selves. So, their bodies went
into superhero mode: Thanks to a rush of adrenaline, lung capacity
increased, pupils dilated to boost sight and the ability to feel pain
dulled.
This is the same stress response that comes into play when you watch
Michael Myers stalk the childhood home of Laurie Strode on a big-screen
TV. But there is one key difference: Unlike with the saber-toothed
tigers our ancestors faced, scary movies and haunted houses are not real
threats, and the brain knows it — even if the body does not. Put
another way, the contrived dangers of Halloween allow a person to
experience that primal, invigorating superhero mode, without the
inconvenient possibility of actually being ripped to shreds.
But … still. Is the promise of a little adrenaline really what drives
people to interact with scary clowns or sit through all nine — nine! —
Freddy Krueger movies?
According to Jeffrey Spielberg, UD assistant professor of clinical science,
one theory as to why some people so enjoy benign horror is that
feelings of intense arousal are undifferentiated. This means the
physiology behind, say, happy excitement is not all that different from
the physiology behind fear — it is largely how we think about a
particular arousal that makes it positive or negative. Another theory
posits that a little bit of fake horror makes coping with our own
vulnerability just a tad easier.
“There are lots of things in the world we are scared of that we can’t control,” said Spielberg, director of the Connectomics of Anxiety and Depression Lab at UD. “Whereas, in a haunted house, you know that it’s not real, so you can experience danger while feeling like you have that control.”