As Brian has said, carry a full size spare wheel or face the prospect of a LONG drive home, but getting close to 30 MPG!!
Always remember that the handle to raise and lower the jack is attached to the underside of the bootboard in an Impreza so that you dont rip all the skin off your knuckles using a screwdriver to do the same job.........
Oh, and of course, avoid the inbred, incestuous sister shagging moron driving the breakdown truck towards you wearing a moronic grin and forcing you into a pothole the size of his mothers whatsit!!!