What's the harm of slamming the door?

Hazard of forcibly closing the door: 1. Frequently closing the door with force will easily affect the hinge and fixer connecting the door and the body, and other parts are also easy to loosen and get injured; 2. Forcibly closing the door will not only hurt the car, but also affect the people inside. The air flow generated by closing the door forcibly will affect the air pressure in the sealed space, resulting in eardrum pain for drivers and passengers in the car. Correct way to close the door: after getting off the bus, close the door by hand for a certain space, and then close the door with a little appropriate force when it is more than 20 cm away from the car body. On the one hand, the door will not make too much noise, and on the other hand, it will not cause too much loss to the vehicle.