 In the same episode, there is also a direct parody of the "It's a Small World" attraction at Disney parks.In the cartoon, the boats float on a brown liquid as animatronic children sing "Duff beer for me, Duff beer for you, I'll have a Duff, You have one, too," over and over again.Lisa drinks the liquid in the ride on a dare from Bart, and she freaks out from its hallucinogenic properties.