Are there certain things you notice in movie after movie, TV show after TV show, that nip at your suspension of disbelief, because they keep happening as if they're the most normal thing in the world, but they aren't normal at all? Yes, of course there are. So post 'em! I'll kick the game off with a few of my own: 1) Aluminum "movie briefcases" Whenever anybody in a movie or TV show has a briefc…