The Horror: It's all in the Brain
We love to be afraid, just ask Hollywood marketing experts who turn out horror movies and thrillers regularly to consistently solid box-office returns. It turns out that the brain processes 'fright' through the amygdala. The adrenaline boost associated with fear, if the the fear is not too real, can become addictive. This is why some people enjoy skydiving, free-form rock climbing, or surfing very large waves, where the risk is manageable, but still provides a 'rush.'