13. The headrest of a car has many purposes. One of it is that in case of an unfortunate incident when you are trapped in the car and looking to get out. All you need to do is remove the headrest and wedge it into the window sill of the car.
14. The metal gauge placed at the top of the pumps purpose is to avoid explosions because some people forget to take the gas pump out.
15. The throw away plastic cups and the plastic lids can act as a double coaster too.