I have to look up your reference to the Luggage of Discworld as it's been sooo long since I read that series, but after the third time it flipped and took a chunk out of my ankle, I yelled at my sister, "WHY DID WE BRING THIS?"

"No one will mistake it for their own." (My friend went to Ireland with us. Tied a big green ornament on her bag. Someone grabbed it and took it home, leaving her with HIS luggage with a big green ornament on it.)

"We couldn't GIVE this thing away!" my response.

It just got to be funny, as we kept yelling, 'Watch out...' Bag claims another victim... 'for the luggage...' through out the entire trip. :P