When the phone rings while the driving instructor is having coffee with Samantha, the noise startles him and he kicks the coffee table. This causes his coffee cup to fall off the table and upsets all of the other items on it. In the next shot, the cup and all the other items are in their original positions.
When the driving instructor assists Samantha into the car the driver's side window is down halfway.
But when Sam and the instructor are then showed inside the car the window is all the way down.
But when Sam and the instructor are then showed inside the car the window is all the way down.
During the driving lesson as Endora is appearing and disappearing from the back seat, the driving instructor's head clearly jerks around, showing when edits have been made.
At one point while in the car during the lesson Mr Harold appears to have control of the vehicle with a 2nd steering wheel. Later in the lesson while Samantha turns her steering wheel to do a U-turn, Mr Harold's wheel appears nearly stationary, even disconnected.