this strikes me as bland. its very "object oriented" play with the framing a bit (i guess by that i mean "move closer") get only part of the mirror frame in the shot. see if that makes it any more dynamic...
Of course you are looking through the car window, and you can see a little bit of the edge of it in the lower right hand of the frame, but at first glance you percieve the mirror being the window, which doesn't really fit with the theme of the challenge. An interesting idea, nonetheless.