Bob knew we tend to jump a lot higher when startled if we’re on the edge of our seats anyway. If we’re watching a scary movie and someone makes an unexpected noise we leap in terror. But if we’re engrossed by something, a crossword puzzle, say, and someone startles us, our leap is less pronounced. From this Bob deduced that when psychopaths see grotesque images of blown-apart faces they aren’t horrified. They’re absorbed.
