Understandably, once the Indominus rex gets out, people and fellow dinosaurs alike know to stay out of its way. Along with being super smart and bloodthirsty the thing is absolutely huge, with most of the information released so far suggesting that it's even bigger than the T-Rex. There's a brief moment where a huge claw tries to tear Chris Pratt and a couple of kids to pieces. And it's legit scary! But apparently there is one dinosaur that's willing to stand up to the big bad I-Rex. Surprisingly, it's the Pteranodons (or some other flying dinosaur) that start kicking up a fuss when the I-Rex breaks into their enclosure. Sort of like how the raptors tear into the T-Rex in the original Jurassic Park.