user
Given a cartoon image and a caption. Caption: That's why they call him The Kid. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A reference to the outlaw "Billy the Kid", who got his name because his face/appearance looked useful, but this person is called "The Kid" because they are acting like a child by bringing a balloon to a shootout in the wild west town. It's humorous partly because we expect him to lose the duel with the person with a gun, but he has somehow survived long enough to get a nickname.