Oooh, Eomer, you are a difficult one!
But see, that's my point about replicas and blissful ignorance. Even anatomically correct replicas that are as great as the originals can be dissected and its flaw(s) found by an expert. And isn't that what we are here for (in this forum)? All of us are to some degree an 'expert' above those who have never read the books. We are chipping away at the movie, finding its flaws. Even myself, right now. And I reiterate, that those who haven't read the book are not doing this. At least not to the extent that we are. Which comes to your question about just plain old unfunny stuff in the movie. I think the people to answer your question best are not going to be here at all.
I myself will have to watch the movie again for any examples.