Final answer:
Collisions become more serious when drivers panic. Maintaining control of the steering wheel and staying calm is crucial to avoid or minimize the impact of a collision. Calling 911 is important after a collision for emergency assistance.
Step-by-step explanation:
Many collisions become more serious when drivers panic. During a potential collision situation, it's crucial for a driver to maintain control of the vehicle. If a driver sees another car approaching from behind with a risk of collision, the appropriate response would be to stay calm, maintain control of the steering wheel, and try to maneuver safely to avoid an impact or minimize damage. Honking the horn could alert the other driver, but it should not replace active collision avoidance actions. Calling 911 is important after a collision has occurred for emergency assistance, but the first priority is to avoid the accident if possible.