There are 3 girls, a brunet, a red head, and a blonde they are all in a car and they are going for a bushwalk, so the red head gets out of the car with her drink bottle, the brunet does the same thing, and then the blonde gets out of the car and also takes her drink bottle and she cuts of the door of the car and takes it with her. Then the red head asks her, “Why did you take off the car door?” the blonde replied, “Because, when I get cold I can just wind the window up, and when I get hot I can wind the window down!”.