Final answer:
Natter is most likely in the Alarm stage of the general adaptation syndrome.
Step-by-step explanation:
Natter is most likely in the Alarm stage of the general adaptation syndrome. The general adaptation syndrome consists of three stages: alarm reaction, stage of resistance, and stage of exhaustion. The alarm reaction is the body's immediate physiological reaction to a threatening situation or emergency, and it is characterized by the fight-or-flight response. In Natter's case, narrowly avoiding a car accident triggered an immediate reaction, including a rapid heartbeat and a rush from the adrenaline in his bloodstream.