Fun thread
My Ford superduties had 'trailer' mirrors that extended and had small concave (?) aspherical mirrors on the bottom, very helpful with blindspots/rear view when hauling a long gooseneck horsetrailer, so I appreciate the OPs interest.
That 'objects are closer' mirror sight gag from Jurassic Park posted earlier was the funniest thing in it and one of the better sight gags out of Hollywood in recent years.