The sheriff's police cruiser switches from a 1973 Plymouth Satellite Custom to a 1973 Dodge Coronet where Frady takes a shortcut through a construction site. And when he crashes the cop car in a local Safeway, the cop cruiser is a 1973 Plymouth.
The politician played by Jim Davis is called George Hammond by the investigating committee at the end, but earlier, when his picture is in a newspaper on the flight, the caption beneath his photo says John Hammond.
The score in the "Pong" game between the scientist and the monkey changes instantly from 6-1 to 3-4.
After the dam flood scene, Joe steals Sheriff L. D.'s police car and pulls into the driveway of his house. Deputy Red discovers Joe escaping from the house and driving away in his police car, but on his radio calls in "Yeah, somebody's broken into L. D.'s house and stole his car" which is incorrect.
In the opening Independence Day parade sequence, there are no leaves on the tree branches visible as the senator and his wife pass by, but the leaves would be full and green on July 4th in Seattle.