In the year 2000 Dudley decided to play an end of the world prank. The whole world was afraid that the world would end, but Dudley wasn't actually concerned. So he thought he would make his family believe the world had ended. He put the lights in his house on a timer, so they would all go off at midnight. He also found a way to turn off the two closest streetlamps to his house. He set up fog machines outside his house and set them to turn on 30 minutes before midnight – so that by the time the New Year came around it would definitely look like a different world outside.
That night his family was watching movies to welcome in the New Year – something they did fairly often – when right at midnight the power went out. They went to look outside and all they could see was a grey fog. They were all really scared that the world was ending. Dudley was trying really hard not to laugh. Petunia was busy grabbing all the extra blankets and putting them on everybody's beds. She was so scared that they were all going to die.
The next day when she realized it was just a prank she laughed. She was a little upset that he would pull a prank on something so serious but in the end she had to agree that it was quite a prank.