Plot twist is an important technique that in this case causes the reader to be amused from the beginning. This is also seen in the scene of "Lamb to the Slaughter", where Mary Malone's husband asks her to sit down because he needs to speak to her of something important. "And he told her. It didn't take long, four or five minutes at most, and she say very still through it all, watching him with a kind of dazed horror as he went further and further away from her with each word." (Dahl). This intrigues the reader giving them a notion that the calmness of the night will not last for long. This twist causes readers to be intrigued as it makes them wonder how would she react to the news of her husband leaving her. As shown, these twists are techniques used by both authors to grasp the readers' attention. However, plot twist are important in this case to keep the readers interested.
Deriving from the previous point that plot twists intrigue readers; they also tend to invigorate them and cause excitement in a story. The story of "The Case of Lady Sannox" brings an exciting twist in the last scene. The mysterious "turk" brings an unexpected change to the story as he asks Doctor Douglas to make an operation on his wife. This brings "Familiarity with such grim matters may take the finer edge from a man's sympathy. To Douglas Stone this was already an interesting case, and he brushed aside as irrelevant the feeble objections of the husband" (Doyle). This leaves readers invigorated as to what this stranger will bring into the story. This twist motivates us to keep reading, while also keeping the reader attentive to the upcoming events. An example of this is also shown in "Lamb to the Slaughter", when Mary Maloney is told by her husband that he is going to leave her. "Her first instinct was not to believe any of it, to reject it all.