text: The question is, how does this machine gather muscle movements as a certain type of emotion? How that works is the human body has similar facial expressions for certain moods, such as raising eyebrows when surprised. These are automatic in just about everybody, making it way easier to gather emotions. If someone were to, for example, tighten their lips, near everyone could understand the possible tension and anger from the person. Thanks to the easy understanding of facial patterns, the machine can too!