user
Given a cartoon image and a caption. Caption: You call THAT pushing? Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A joke about childbirth. The woman is pushing her kids up the hill in the stroller, but the quote references the pushing associated with the pain of labor/giving birth. The woman has had a few kids and is unimpressed with the "pushing" the man is thus unimpressed with the man who is only pushing a rock up a hill.