When Darrin is driving Larry and Louise around to avoid taking them to his house, he pulls over and pretends there's something wrong with the car. However, one can see in the background the home of Pleasure O'Reilly, their next door neighbor. This means that Darrin stopped across the street from his house, the very place he wants to avoid.
Darrin rear-ended another car as he was trying to leave the airport pickup area. In real life, he would not have been able to leave the scene of an auto accident immediately without having to report it.