" I made myself tea. Just like today. I sat here and was about to start my essay when I heard a noise coming from upstairs. Like I said, I knew no one was home. I should have been scared, right? I remember one time I heard this English professor asking the class what the world’s scariest noise is. Is it a man crying out in pain? A woman’s scream of terror? A gunshot? A baby crying? And the professor shakes his head and says, ‘No, the scariest noise is, you’re all alone in your dark house, you know you’re all alone, you know that there is no chance anyone else is home or within miles—and then, suddenly, from upstairs, you hear the toilet flush.’ ” Christa "

― Harlan Coben , Caught