That's not an irrational question, and I thought of it myself. But you must remember that movies do not exist in real-world logic. Almost all of the greatest movies ever made have no logical explanations to them; they are made for simple enjoyment.
Does anything in "Star Wars," for example, make any sense?
What I wondered in "King Kong" was what happened to the natives after they sacrificed Naomi Watts to Kong. They just kind of disappeared. Where did they go?
LOL! Believe me I know that. I have a 5 year old daughter.
I would have liked to see them tackle this problem for once though. How to you move a 20 ton unconscience monkey? (Ok. Ape)