Literary Sleight of Hand

I like these stories where the author causes you to pay attention to one thing then sort of whips around and slips something else in or changes the focus toward the end. It's like magic. Like literally like magic and I think pulling this off in a story takes just as much practice and effort as directing eyes during a magic trick. Harder perhaps since there are rarely curtains to place your hands behind when you are writing a story. Okay maybe easier in a story. Anyways this seems like an important and valuable skill to learn.