Do you want to hear a funny joke ?   OK . Are you sure it's funny , though ?   Well , you'll see .   OK .   OK , an Englishman , a Scotsman , and an Irishman were going on a trip across the desert , and they could only take one thing with them .   I see .   So they met up at the start of the journey and showed each other their equipment .   Oh , that's funny !   Hang on , I haven't finished yet .   Oh , sorry .   Well , as I was saying , they showed each other what they had decided to bring . The Englishman had brought some water . " If we get thirsty , we'll have something to drink , " he said . The Scotsman brought a map . " If we get lost , we'll be able to find our way . " The Irishman had brought a car door .   A car door ? You mean just one car door ?   Yep . A car door . " Why the door ? " the others asked him . " Well , " he said , “ If it gets hot , we can open the window . " Do you get it ? 