Factual error: The deer in the forest somehow does not hear the giant dinosaur approaching, so doesn't run away. (01:21:10)
Suggested correction: A different interpretation is that the deer knows the difference in the sounds - gurgling/roars of an approaching herbivore versus carnivore - so it didn't perceive it as a threat until it got unusually close (so the deer looked to see why). The dinosaur flung the deer aside, then proceeded to eat the vegetation where the deer was. It isn't likely that the dinosaur (if a carnivore) would toss aside a fresh deer meat brunch in favor of some green brush.
The therizinosaurs were herbivores.
Revealing mistake: While in the helicopter, Alan's eyes do not align with the location of the Dreadnoughtus. Alan is looking to his far right before the helicopter even approaches the dinosaur and it is shown across the front of the screen. Alan's eyes then stay fixed straight ahead (even after passing the dinosaur), giving the impression he's looking at the dinosaur, but he would have needed to keep turning his neck to the right as the helicopter flew past in order to keep it in sight. (00:35:14)
Suggested correction: It's a common movie trope. The two things aren't happening in sequential order. They're happening at the same time. Alan isn't looking before the helicopter approaches the dinosaur...you're seeing the inside of the helicopter as it approaches and passes the dinosaur. They're happening at the same time.
