YMMV / Mystery Science Theater 3000 S03 E24: Master Ninja II

• Aluminum Christmas Trees: Dr. F and Frank's Invention Exchange is a buffet that runs on a conveyor belt, letting you take food as it comes by. Restaurants like that exist; they are a popular way to serve sushi, and usually work by using color coded plates. The customer takes whatever food they want, then pay based on the plates they wind up with.