Factual error: The car is equipped with shatter-resistant glass yet Cujo manages to break through - even rabid, this should not be possible.
Cujo (1983)
1 factual error
Directed by: Lewis Teague
Starring: Dee Wallace, Christopher Stone, Danny Pintauro, Daniel Hugh Kelly
Continuity mistake: The fence at the start of the movie changes as Cujo chases the rabbit. In the shot as they run towards it, there is just one straight plank running across the bottom. When they reach it, there is now an askew, diagonal plank attached to the straight one. (00:02:00)
Donna Trenton: Please God get me out of here.
Answer: Not really. Rabies has a wide range of behavioural symptoms, and it's rare for a rabid dog to display what's called "furious rabies," whereby they become more aggressive. And even then, they wouldn't become single-mindedly determined to terrorise two people in a car. It's much more common for a rabid dog to get slower/lethargic as paralysis sets in, eventually leading to coma and death. You can find more info here: https://vcahospitals.com/know-your-pet/rabies-in-dogs.