(Homer sitting next to a "Diet Drug Z-3" jar, with food going past him on a conveyor belt, but he only sits there without touching the food.)
Male Scientist: That appetite-suppressant is amazing.
Female Scientist: Homer, you really have no desire to eat that food?
Homer: Food? I'm blind!
(He starts running in the room while screaming.)
Male scientist: Who's gonna buy a pill that makes you blind?
Female scientist: We'll let marketing worry about that.