This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Rise of the Planet of the Apes
Yeah, Hunsiker was a jerk, but consider this: Imagine being chased by a vicious chimpanzee hellbent on killing you for being angry your car's been smashed up. Or worse, being the poor bastard getting beaten to death by a dozen or so angry apes. At least Caesar steps in to save the latter before it's lethal, putting him in a cell for his own protection.
Koba himself. Out of all the apes, he's the most horribly scarred and demonic looking.
Caesar's first few moments in the primate center. Locked in a small cage, at the mercy of a threatening human "overseer" whom he can understand, and surrounded on all sides by angry chimps screaming and thrashing around violently.