… get blown wildly off course and become lost after drifting into dense fog. After several hours of failing to discover where they are, one of the gentlemen says “I can tell where we are simply by reaching down into the fog!”

He promptly reaches over the edge of the balloon, rummages around and announces “We are currently over Pisa in Italy”. His friend is astonished and asks how he can be so sure, “Well,” says the first gentleman, “I could feel the top of the Leaning Tower!”

Several hours later he reaches over the side again and says simply “Paris, France”. His friend looks at him knowingly and asks “Eiffel Tower?” the first man nods.

An hour later the man reaches over the side of the basket and swiftly tells his friend “Now we’re over central London”. “Big Ben ?” asks the second man. “No, no,” replies the first, “someone just stole my watch …”