Well, at least what she didn't know I had to inform her of while in her new Mazda3. She was complaining that being lower (she used to drive an MPV) made all the headlights behind her brighter. So I told her to adjust her mirror to block them out more and she had no idea what I was talking about. She had NO IDEA that the flip switch on the rearview mirror existed. How does someone drive for 6 years and not learn about that? Anyone else here just get enlightented by this thread?