Board Thread:General Discussions/@comment-31524712-20170319210335/@comment-4820209-20170422023430

Thunderstudent Returns wrote: Except in the movie they said I-Rex was crazy and killing sauropods and other dinos for sport and not for hunting purposes specifically. One of the first things they said IN THE TRAILER! Yeah, and right before that scene Chris Pratt's character explicitly says that it's "finding it place in the food chain", with nothing about craziness said. Given what the film's dialogue was like, it's pretty obvious the "hunting for sport" was more so exaggeration at the fact that it was being extreme in killing everything. The dinosaur never once showed an actual inclination towards behavior like that and every single action can be explained by its origins and social setting before its escape.

Don't forget, a running theme in the film was making mistakes, something also present within the dialogue.