Position of the professor's assistant behind him when Jeremy confronts him.
When Jeremy and Darla are leaving her house and walking to the car for their first date, Jeremy's reflection is clearly visible on the hood of the car.
When waiting for Darla at her house, Jeremy's reflection is clearly visible on the family's cabinet
Darla's window goes from being closed during the police chase, to being open (with her hand hanging out the door), after the car rolls over.
When Jeremy rolls over the car during the police chase, you can clearly see that only the stunt driver is in the car.
When Grimsdyke spots Ralph's car in the school lot a crew member is visible in the
Front side window where the professor is sitting. The same crew member is visible when Grimsdyke backs the van up.
When Grimsdyke is chasing Ralph during the student driver scene just as they turn on a main road you can see the street blocked off by a police officer and a crowd of onlookers watching the filming.
When Jeremy Capello (Robert Sean Leonard) is in the kitchen you hear the traffic report on the radio. Reference is made of an accident on Kirby at Montrose. The streets do not intersect but are parallel and are separated about 5 miles apart.
Modoc recommends that Jeremy should drink pig's blood, B- specifically. Swine do not have type B blood, only A and O.