When we sense danger, the brain react instantly, sending signals that activate the nervous system. This causes physical responses, such as a faster heartbeat, rapid breathing, and an increase in blood pressure. Blood pumps to muscle groups to prepare the body for physical action(such as running or fighting). Skin sweats to keep the body cool. Some people might notice sensations in the stomach, head, chest, legs, or hands. These physical sensations of fear can be mild or strong. This response is known as "fight or flight". Read the description above, which would NOT be an example of "fight or flight" response? Running away from a campsite because you see a bear approaching from the distance. Running away from a campsite because you see a bear approaching from the distance. Fainting when you see a picture of someone getting a shot because you are afraid of needles. Fainting when you see a picture of someone getting a shot because you are afraid of needles. Hitting your sister in the face, because she jumped out from behind a bush and scared you. Hitting your sister in the face, because she jumped out from behind a bush and scared you. Lifting a chunk of cement off your body after an earthquake.