Watch the ending of the film carefully. When the helicopters are shooting Utam the Peking Man to pieces, the impact of the rounds on his body, considering how big he is, should be tiny. But they are huge, as if the weapons being used are his size. Also, when Samantha and Johnny are wounded by the same helicopters, the rounds should have torn their limbs off entirely, not just scratched them.
During the earthquake in the film, in some shots the background shakes but the foreground does not.
During the elephant stampede in the film, several men shoot at the elephants with handguns. That would likely only tickle them.