Factual error: When Roland is walking in the pouring rain and talking about killing the T-Rex, he has his gun slung over his shoulder vertically and barrel-upwards. If you were to do this in real-life in a tropical rainstorm for very long, you would run the risk of water entering the barrel and causing problems with the gun. And as a professional hunter Roland would know better. (01:07:50)
Factual error: When the first half of the trailer is hanging over the cliff, the second half is pulled towards the edge. But the pull from the first half would be going downwards - in a 90-degree angle to the position of the first half. That would not pull the second half outwards, but more lift the end up. (00:59:35)
Factual error: When the T-Rex grabs Eddie out of the car, as soon as it takes its foot off the hood the car shoots forward and both it and the trailers fall off the cliff. In reality this wouldn't happen, the trailers would have simply started sliding again slowly. It's also shown that the cars wheels start turning faster as the car picks up speed going forward. Eddie had the car in reverse, as soon as his foot came off the pedal it would have stalled meaning the wheels wouldn't have turned and instead it would have just been dragged like it was doing before he got back behind the wheel.
Factual error: In the last scene of the movie it shows the adult Tyrannosaurs and the baby. Then it shows a Pterosaur. If you put on subtitles it says [Pterodactyl shrieking.]. Those couldn't be Pterodactyls, since Pterodactyls were much shorter and had no crest. Those Pterosaurs are in fact Pteranodons.
Factual error: When Hammond is talking with Malcom about going to Site B he says that the departure is from San Diego which is "a couple of hours" away from there. A flight from San Diego to Costa Rica would take over 5 1/2 hours. Then there is the trip to the island.
Factual error: After Ian and his girlfriend get the baby T-rex from holding in San Diego, they track down the big T-rex. They pull into a gas station and the Trex knocks the large 76 ball towards them. The problem with this is that that gas station/intersection is not in San Diego, CA but in Granada Hills, CA. The cross streets are Rinaldi and Balboa. (01:49:00)
Factual error: When Eddie is pulled from the car, it zooms forward and goes over the cliff. In reality this wouldn't happen. Right up until his death, Eddie had the car floored in reverse. Once he took his foot off the pedal the engine would have stalled. If a car is in gear and the clutch isn't depressed then the wheels won't turn (especially on wet mud!) The trailer would have had to drag the car but the wheels are shown turning freely.
Factual error: There is no way that the SS Venture could plow into the dock as depicted. Easily pulling a 30-foot draft, the Venture would have grounded out a mile away from the shoreline, unless the ocean was 30 feet deep right off the beach.