Let me just clear one thing up, lest there be any confusion a few paragraphs down the page. The Sitter isn’t a great film. In all likelihood, it may not even be a very good film. But the mostly-praise you’re about to read about this movie is a reflection of the fact that despite its deficiencies — and they are many — this film is a dumb comedy made by smart people who know how to make you have fun despite what might be in your best interest.