Images that make you laugh
Laughing more than once at an image is too mainstream
Well its clearly a fabricated test for the sake of humor.
However, one time I did write a really long elaborate story to answer a test question I didn't know the answer to. But my geology teacher marked my answer as correct because he claimed my story was an allegory for the correct answer or something like that. I think he was really just making an excuse and he really just marked my answer as correct because it amused him during the dull hours he likely had to spend grading tests.