In the scene in which the visitors are waiting for the TRex to appear, there are three glaring errors, amongst many in this film. After the dinosaur fails to put in an appearance, the windows of the Ford are clear. When Jeff Goldblum moves away from the window, it is spotted with raindrops. When Sam Neill says "Damn", the camera pulls away and several microphones can be seen clearly inside the car. When the car moves away, use the slow motion function, and somebody's head can be seen bobbing up and down just below the rear window.