user
Given a cartoon image and a caption. Caption: Gesundheit. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A physical joke about what might happen if someone sneezed while getting acupuncture. While this probably wouldn't literally physically happen, the implication is that the person sneezed, and all the needles transferred from her to the acupuncturist, which is funny. We know this because the doctor is saying "Gesundheit," which is what is said after someone sneezes.