Three men are in the middle of a desert when their car breaks down. For their hike to town， they each decide to take one thing with them.

One man takes a jug of water. The second man takes a sandwich. The last man takes one of the car doors.

The first man says to the last man： “Im bringing the water because if I get thirsty， I can take a drink. And it makes sense to bring a sandwich in case we get hungry， but why bring a car door？”

The last man replies， “If I get hot， I can just roll down the window.”