A Canadian, an American, and a Mexican were on a North American transcontinental flight. The Canadian stuck his hand out of the plane, and said,
"We have reached Canada." The others asked,
"How do you know?" The Canadian responded, "Because I have just touched the tip of the CN tower." A couple hours later, the American sticks his hand out of the plane and said,
"We have reached the USA." The rest asked,
"How do you know?" The american replied, "Because I have just touched the tip of the Empire State Building." Another couple of hours passed and the Mexican said,
"We have just reached Mexico." The American and Canadian asked,
"How do you know?" The Mexican answered, "Because when I stuck my hand out the window someone stole my watch."