Last year, more than 1,300 people entered a lottery to spend a night in a hotel room in Chattanooga, Tennessee, known as the "Annalisa Netherly Room." This room is believed to be haunted by the memory of a 1927 event in which Annalisa Netherly was beheaded by her lover. The popularity of this lottery is just one example of the widespread fascination with horror, which excites people for both psychological and physical reasons. According to Dr. Elias Aboujaoude, a professor of psychiatry and behavioral sciences at Stanford University School of Medicine, our biological reaction to fear is complex and involves neurotransmitters and hormones that affect areas of the brain from the amygdala to the frontal lobe. This response can activate both unpleasant emotions, such as stress, and pleasant ones, like relief. Our bodies have evolved to prepare for "fight or flight" when faced with a threat. This includes dilating pupils to see better, widening bronchi to absorb more oxygen, and diverting blood and glucose to vital organs and muscles, explains Aboujaoude. The effect of fear on the body can be exhilarating, and psychologically, it can provide a sense of satisfaction or triumph when the object of fear disappears. Adrenaline, dopamine, and cortisol are three important chemical substances released by the body in response to threats. Adrenaline helps awaken the "fight or flight" instinct, increasing heart rate, blood pressure, and respiratory rate. Cortisol, a stress hormone, helps regulate bodily functions and can increase alertness after the initial release of adrenaline. However, chronic high levels of cortisol can be harmful, putting the body in a constant state of stress. Dopamine, a neurotransmitter linked to pleasure and reward, is also involved. It is released when we anticipate or receive a reward, such as overcoming a threat or achieving a goal. This does not mean dopamine only acts once the threat has passed; it is released from the moment we expect a reward. In addicts, dopamine can create a sense of euphoria even before the drug is obtained. Dr. Aboujaoude notes that fear can provide a kind of exhilaration when one is aware that they will emerge unscathed, such as in haunted houses or roller coasters. Facing fears can sometimes help people desensitize themselves to emotional triggers, though others may unnecessarily put themselves in danger. Some people may enjoy the thrill of facing fears, while others may take risks that could lead to harm. If haunted houses and horror films often target teenagers and young adults, it is for a good reason. This age group often questions death, fears, and courage, according to Tok Thompson, an anthropology professor at USC Dornsife. Facing fears is an integral part of adulthood in many cultures, often serving as a social experience where young people test themselves. Some fears are "pre-programmed" by evolution, as explained by Alice Flaherty, an associate professor of neurology and psychiatry at Harvard University. Our ancestors learned to avoid frightening stimuli, which helped them survive and pass these instincts to us. Children do not need to learn to fear loud noises, spiders, snakes, blood, and fast-moving objects, as these are considered innate fears. However, most fears are learned through experience. One person might fear dogs after being bitten, while another might fear bees after an allergic reaction. Research shows that these stimuli do not need to be real to scare us, but the more realistic they are, the more they scare us. A real snake will scare you more than a virtual reality simulation, which in turn will scare you more than a photograph, according to Aboujaoude. Fear can also vary by gender, adds Flaherty. "It is said that men like horror films more than women, but it seems well established that men tend to identify with the predator and women with the victim," she explains. Our fears are extremely varied, which is why Scream-a-Geddon, a 24-hectare horror park in Dade City, Florida, employs a wide range of horror tactics. The park features clowns, witches, a replica of a prison, and a failed biotech experiment. Most visitors arrive in couples or groups of friends. Jon Pianki, the park’s marketing director, notes that the park is designed to be "anxiogenic," but also offers moments of respite. "Visitors enter hesitantly, in a tightly packed group, and when the fear has passed, they leave all excited and laughing."