As a passenger in a car, you are not able to control the vehicle and its movements. Therefore, it is important that you know how to brace for impact if there is an accident or sudden stop. The first thing you should do is remain calm and make sure your seat belt is securely fastened around your body. Then, grip tightly onto the armrests on either side of you and keep your feet flat against the floorboard with legs bent slightly at the knees. Keep your head up so that it does not hit any part of the dashboard or windshield while also tucking it down towards your chest to avoid whiplash-type injuries. Finally, focus on taking slow deep breaths until the impact has stopped as this will help keep your muscles loose which can reduce overall injury potential from quick jerks during an accident.