Fridge: The Wonderful Wizard of Oz
- The Wizard gives the Lion liquid courage.
- Scarecrow's incorrect quote after receiving his diploma. While often regarded as a goof, this could have been intentional, subtly implying the brain the Wizard gave Scarecrow was fake - since as is established, Dorothy, and by extension the whole group, had all along had what they were looking for, just not been aware of it.
- They have to climb over a large wall to get to a land where everything and everybody is made of china. A great wall, one might even say.
- The Tin Man is in many ways an early Cyborg.