A Polack and a Jew were walking in the desert. The Jew was carrying a watermelon, the Polack was carrying a car door. After a while the Polack said, “Why are you carrying that watermelon?”
The Jew said, “So when it gets too hot I cut it open and eat a piece of it.”
After a while, the Jew said, “And why are you carrying that car door?”
“So,” said the Polack, “when it gets too hot I just roll down the window!”