Board Thread:Movie discussion/@comment-11023504-20150706222512/@comment-17754282-20150811200902

It's alright saying that the Ankylosaurus would not have attempted to run, but the simple fact is that these animals were born and raised in an artificial environment. As such it likely had never encountered a predator before and its running was more to do with being spooked by something big, loud and unknown as opposed to what should be its natural response to a predator.

The Ankylosaurus lived with many other herbivores where it is very unlikely that anything would have attacked it, and the biggest threat it faced was being stepped on by a lumbering Apatosaurus, which is easily avoided by getting up and hurrying out of the way. It was only once it became clear that the Indominus wanted to acutally fight it that the Ankylosaurus' natural defensive behaviour kicked in.

You can't just assume that any animal in Jurassic World will behave naturally because they were not raised naturally - many animals raised in captivity around the world would struggle if released into the wild all of a sudden, but the Dinosaurs of Jurassic World would experiance this moreso because there just in no other animal for them to learn behaviour from.