"Such officers getting out of control would be the ultimate nightmare," he said.

Being taken for granted: for a series of consistent quality, that's probably the ultimate nightmare.

From there, it will be just one step away to that ultimate nightmare: a clash of civilizations.

Replacement by their own clone was the aristocrat's ultimate nightmare.

"This guy was our ultimate nightmare," an American intelligence official told the Times in late 2001.

They had to become their enemy's ultimate nightmare.

This is the ultimate nightmare of marriage as catastrophe.

It is one of the greatest of all American horror stories, the ultimate nightmare to which fame may lead if you don't watch out.

Many parents would consider it their ultimate nightmare.

For patient and doctor, it is the ultimate nightmare: a surgeon operates on the wrong part of the body.