George and Nancy get along just great, except that she's a 
"backseat driver" second to none.  After years of putting up 
with her pestering, he finally decided he had enough and 
advised her that he would no longer drive with her in the 
car. 

Later that day, on his way home from doing some shopping 
at the mall, he heard his cell phone ring, just as he was 
merging onto a freeway. 

It was Nancy.  By chance, she had entered the freeway right 
behind George. 

"Honey," she said, "your turn signal is still on.  And put on 
your lights; it's starting to rain."