SMD, buys a new automatic Jaguar XKR Sport.
He drives the car perfectly well during the day, but at night, the car just won't move at all.
After trying to drive the car at night for a week (but without any luck), he furiously
calls the Jaguar dealers and they send out a technician to him.
The technician examines the car and finds nothing wrong with it. So he turns to SMD
and asks: "Sir, are you sure you are using the right gears?"
Full of anger, SMD replies: "You fool, you idiot, how on earth could you ask
such a question? I'm not stupid you know! Of course I am using the right gears;
I use D during the day and N at night."