The scene where Ajax is kidnapped into a wicker basket, which is then lost in a sea of wicker baskets, is a remake of the same scene/situation in this movie where Marion is likewise kidnapped.
When Duckman and Cornfed are re-captured, they are brought into a cave with exposed lava, and Duckman is enclosed in a cage to be lowered into the lava, just like the cave portrayed in the movie.