Factual error: Not so much of a mistake, but I want one of those satellite phones. I have a mobile which I can't hear in my pocket, let alone a hundred meters away in the belly of a dinosaur or later buried in a mound of dino dung. There is no way a 2001 phone's tiny speaker could penetrate that much insulation.
Plot hole: The spinosaurus manages to smash through a metal reinforced wall designed to stop dinosaurs getting past it without too much effort, yet it can't get through a wooden gate secured by some metal bars. It makes no sense.
Dr. Alan Grant: What John Hammond and InGen did at Jurassic Park is create genetically engineered theme park monsters. Nothing more and nothing less.
Woman: Um, are you saying that you wouldn't wanna get onto Isla Sarnoa and study them if you had the chance?
Dr. Grant: No force on Earth or Heaven will get me on that island.
Dr. Alan Grant: Well, you're alive, and that's the important thing. And thanks to you, that's one thing we have in common. Did you read Malcolm's book?
Eric Kirby: Yeah.
Dr. Alan: So?
Eric: I...I don't know. I mean, it was kinda preachy. Too much chaos, everything's chaos. Seemed like the guy was kinda high on himself.
Dr. Alan: Well, that's two things we have in common.
Question: I have to question what killed the speedboat's crew at the beginning of the movie. I don't think the Pteradons would be that fast in attacking and they were locked in the cage. I doubt the Spinosaurus would go that far out to sea and kill the people that quickly. What other dino(s) could have done it out at sea and so fast (and were so messy eaters)?