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: Some of the worst things imaginable have been done with the best intentions.
Amanda Kirby: So, that's how you make dinosaurs?
Alan Grant: No, that's how you play God.
Velociraptor: Alan!
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.
Answer: While the movie doesn't explain this, it most certainly wasn't a dinosaur (since a carnivorous dinosaur would eat him). However, in Jurassic Park Adventures: Survivor, he dies from internal injuries due to the rough "landing".
Bishop73