Funny Joke

Three guys were stranded in a desert, an american an arab and an indian. They were thirsty and hungry and started loosing hope of survival. As they were walking in the heat they saw an old abandoned car.
They ran to it and the American straight away popped the hood and ripped out radiator telling the other two : whenever im thirsty ill have a sip of water from this.
Next the indian rips off a seat from the car saying: whenever i get tired of walking, ill rest on this seat.
Finally, The arab looks around and suddenly rips the door off.
The other two confused ask him " how is that supposed help you here?"
Arab: whenever i feel hot, ill roll down the window