Weird thing tonight, pulled over in a parking lot to take a picture of an amazing cloud formation, had my key in my pocket. When I went to start the car, it wouldn't recognize the key. Flipped open the manual (which, once again, should be a searchable pdf by now - it is 2015) and on page 69 found I should hold the key vertical next to the steering column. Voila, it syncs and car works again. My question is, what would have made it stop being recognized by the car? Is this something these keys do from time-to-time? Has this happened to anyone else?