It occurs to me that there's not enough anticlimax in popular entertainment. Just once, I'd like to see a suspense movie where the detective says "I think I know who the killer is! Get me a list of every cop who's been fired since 2007!", and later has to admit that his hunch was wrong, and that he has no ideas. Ideally, the conflict would end when, during a standoff with the police, the killer is accidentally crushed under a ton of canned peas. We'd learn his identity but not his motives.
I've seen these things done before, but never in the way I'm imagining them. In slasher movies, the audience is usually invested in the survival of the central character. In suspense films, everything comes together when someone says something like "It's not Professor O'Brien! It's his teaching assistant!" Queue explosion, or cut to coed tied to a chair in the basement or whatever.
Of course, you can't make a movie without any exposition because it wouldn't hold anyone's interest. But there's a wide gap between efficient storytelling and simply wasting time that deserves more exploration.