* AdaptationDisplacement: Many know about this film, little know that the gist of the story came from an article by Harold T. P. Hayes.
* NightmareFuel: [[spoiler:The brutal murder of Dian's favorite gorilla, Digit. And if seeing him killed wasn't enough, we are "treated" to a shot of his headless, handless corpse.]]
* TearJerker: A solid candidate for the most heartbreaking film of 1988 [[GraveOfTheFireflies that doesn't involve Sakuma Fruit Drops]]. Given that Dian was being played by the always-phenomenally-talented Creator/SigourneyWeaver, well... prepare for your heart to be crushed in epic fashion.