"Roll Down The Window" joke

Sardar, a Japanese, and a British were lost in the
desert. They were driving around in a Jeep when it broke down,
because they had nothing else they decided to each take a piece of
the Jeep as they continued their journey. The Japanese took the
radiator, the British took the seat, and the Sardar took the
door.

After a while of walking the British asked the Japanese "I'm
confused, why did you bring the radiator?" The Japanese
responded, "If I get thirsty, can drink the fluid."

Next the Sardar asked the British "Why did you bring the
seat?" So the British said "If I get tired, I am not going to sit on the
sand. I can sit on this comfortable seat."

Finally the Japanese asked the Sardar why he had chosen the
door. The Sardar quickly responded to this question,
"Well, when it gets hot all I have to do is roll down the window."