What I mean is, T-Rex was WAY bigger in Jurassic Park 1 and 2 than in part 3. Spinosaurus surely couldn't break a T-Rex's neck with such a small bite force compared to T-Rex. T-Rex was what? 12 feet tall in the movie? That's only as big as an elephant. And Spinosaurus was 16 to 17 feet tall. Wrong sizes. T-Rex could reach 16 feet or taller. Spinosaurus... Eh, I don't know.
It's just a movie. Of course there are going to be major flaws. Most people don't really notice them; they aren't that big a deal. And we all know that the people in Hollywood aren't the smartest people in the world.
