When Kemp prepares to get breakfast with Hal Sanderson, he puts on his glasses. In the next shot, the glasses are gone. He stands up and picks up them up from the table.
When Kemp and Sanderson talk at the dock the morning after Sanderson's fiancée refused to leave the nightclub, Kemp's hair is frizzy, unkempt, and blowing in the breeze. Sanderson says, "You blew it, Kemp." When the camera cuts back to Kemp, moments later, his hair is styled neatly.
When Kemp drives the Corvette along the coast, as the camera pans the car and roadway from above, a cellular telephone tower appears in the shot.
When Kemp interviews the tourist couple at the bowling alley,"Telstar" by The Tornadoes is playing in the background. The song was released in 1962.
Kemp mentions a Jacuzzi just before he signs the contract. The Jacuzzi was invented in 1968.
The red airplane in the opening sequence is a 1974 Piper PA-18-150 Super Cub (tail number N8991Y). However, the Super Cub was relatively unchanged from 1949 to 1994.
When Sanderson and Kemp talk in the car, the camera is reflected in Kemp's sunglasses.
When Kemp and Sala experience the effects of the mysterious drug while walking outside by the docks, the lobster in the tank is a Maine lobster (large claws), not a Caribbean lobster (no claws).