user
Given a cartoon image and a caption. Caption: Sorry I'm late. I hit every traffic light coming home. Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
A play on the phrase "hit every traffic light" --- usually, "hit" is a figurative expression someone would say if they encountered lots of red lights at traffic stops driving home: this would cause them to be late because red lights cause drivers to stop. But here, "hit" takes on a literal meaning: because the giraffe is the one coming home and giraffes are tall with long necks, they literally physically hit their head on every single traffic light.