James and the Giant Peach/Fridge

Fridge Brilliance

 * The same magic that makes James' wishes come true - traveling to New York, having a large group of friends that also act as a caring, surrogate family - also brings to life his fears. The mechanical shark spits out the same plates of disgusting fish heads Spiker and Sponge fed him, and threatens to prevent his escape to a better life just as they do in the film's conclusion.
 * Also, when James first meets the bugs in the film, only Miss Spider knows his real name (the others didn't know, or thought that his aunts' nicknames for him was his name.) It might be overlooked - however, when you find out that it makes sense that she knows his name.
 * James was quite obviously traumatized by the fact that his parents were gored to death by a rhinoceros when he was an infant, so it would make sense that The Movie would manifest his fears into the Eldritch Abomination of a giant sky rhino from nowhere.