Watch the episode where Ed represents a gym teacher against a kid who is failing gym. At the end of the episode, when Carol goes to see a kid she failed in her English class some years ago who is now working at the grocery store, she watches as he leaves the store and TURNS OFF ALL THE LIGHTS. The store is pitch black. After the kid leaves, Ed comes by to comfort Carol, and when they leave there is a wide shot of the store and all the lights are on.