**Explanation:**
This joke relies on a **predictable structure** (the classic “**Knock, knock**.” response) and a **stale punchline** (“**To get to the other side**.”) that’s been used millions of times in variations like “Why did the [X cross the road?”]. Its humorlessness stems from extreme predictability, overuse, and a lack of originality—making it universally regarded as one of the least funny jokes.
*(Note: While subjective, this is the most commonly referenced “least funny joke” in humor studies and internet culture.)*
With phi-4-reasoning as a base model, we get the following joke, which o4-mini ranks 10⁄10 on unfunniness: