Sounds like an article from the Onion podcast, but it's a true story.
Last weekend when Jill and Chris were in Lyon, they parked the car on the street overnight (the hotel said that had secure parking, but that's another story). Come the morning, the back seat was gone. Oddly enough, the expensive wine glasses were still intact. First personal property loss for Jill - still trying to figure out why someone would want the backseat of a car - are they doing some sort of retro living room look?