Well, the humans kill him. They kidnap him from the island, and he falls off of a really tall building. Also, a lot of action/violent stuff happens on the island. Pretty much like the first two King Kongs, except with more realistic effects. I saw the 70s/80s one when I was 10 or so, and it didn't scar me for life. I have to admit that I felt pretty sorry for the gorilla, but I think that's the point of the movie.