Whether you are trying to build rapport, get an atmospheric read on a situation or trying to confirm the veracity of someone’s information, you need to first understand how people behave in a predictable manner when under fear or threat. The closer a person or group of people get to that fear or threat the higher the cognitive load they are under. This will cause these observable behaviors to leak out from an untrained person. The higher the stakes the more behaviors they will throw off, which will give you an insight into what they are really thinking. These observable behaviors are researched based and have been used by the military for the last decade to keep our troops safe. By understanding what to look for, you will greatly enhance your ability to navigate the human terrain.