Continuity mistake: In the scene on the Golden Gate Bridge when the apes are pushing the bus, the police shoot the bus numerous times, but when the camera goes off the bus and then shows the bus again (twice) the bullet holes are not there anymore.
Continuity mistake: The fog on the bridge at the end sequence varies greatly from very thick (when on the ground looking from behind the police) to very thin from aerial shots to almost non existent in some overhead shots.
Continuity mistake: During the big face off on the Golden Gate, Caesar climbs on the roof of a black Nissan and signals the apes to halt. In the next shot, the car is now a Volkswagen. (01:24:45)
Answer: It's not necessarily a sign that the orangutan understands human motivations. It could be, and probably more likely *is*, a sign that the ape has shown its intelligence previously during its stay in the habitat, was abused by the humans as a direct or indirect result, and was subsequently conditioned to play dumb.
Phixius ★