An American GI gets on a train in England. The train is full, except there is one seat that is occupied by a big French poodle. The American walks up to the lady sitting next to the poodle, and nicely asks her if he could please sit down. She glares at him, says "No, my dog needs that seat", and looks out the window. The GI looks around the train, still see no other available seats, and asks her again "Please ma'am, I've been fighting in the war and I'm on my way home and I'm really tired. Could you move your dog so that I can sit?" And she just humphs, and continues to look out the window. So the GI opens the window, lifts up the poodle, and throws it out the window.
A Brit sitting across the aisle, who has been observing the interaction, speaks up. He says to the GI: "You Americans, you've got it all wrong. You drive on the wrong side of the road, you cut up your meat with the wrong hand, and...
...you threw the wrong bitch off the train!"