Talking of bulbs being out - the strangest thing I've seen was only 2 days ago. It was some sort of Hyundai (I wasn't paying huge attention, its a Hyundai after all...) which had only one working brake light. Rear nearside (left) was working, centre was out and offside (right) was out, HOWEVER, when he braked, all of his offside indicators illuminated :| Some crazy ass electronics going on there :P