With smartphones these days having built in GPS chips, you'd figure that you'd never lose your phone. Not only that, but in theory you should never lose anything that's currently carrying your phone either.
So goes the story of a man who had his Land Rover stolen from a Wichita Falls, TX Mariott. Inside his Land Rover was his iPhone that he had the Find My iPhone app installed. Using that app, he and the authorities were able to track down his car.