user
Given a cartoon image and a caption. Caption: He's always had his head in the clouds, but THIS ??? Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A play on the term "head in the clouds" --- usually, this is a figurative expression to describe a dreamer, an absent minded person, etc. But here, the person outside the plane not only is absent minded, but also, literally has his heads in the clouds by virtue of standing on a cloud at cruising altitude for the plane.