When the plane is flying upside-down, during a close-up both the aircraft and the background are seen inverted, meaning the plane is actually oriented right-side up.
As James Britten parks his Mercedes convertible, his rear license plate reads "California 356 CFX," the same one normally found on Kelly's yellow Mustang Ghia. BTW, in this episode, the viewer never saw the front or rear of her car. Little wonder.
In the wide shots of the red plane that James Britten is flying, the two windshields are "square" (three-sided). Yet, in the close-ups of him and Kelly, the two windshields are "rounded."
When Kelly is about to tell Teddy Nolan that she's from another planet, as she says, "It will be all right," a shadow - likely from the boom mic - is seen on her forehead.