The core gimmick of the show is the bets: ordinary people offer to perform some unusual (often bizarre) and very difficult task.

But Marvel is also considering a more unusual task, which was endorsed yesterday by a committee of stock owners.

More unusual tasks such as dropping naval mines have also been practiced at times.

Race directors pride themselves at challenging racers with unexpected or unusual tasks.

Not so difficult or unusual a task for those practiced in the art of sorcery.

For the same family, Mrs. Rasini faced another unusual task.

Everyone else had grown grim indeed when there should have been some measure of satisfaction for the completion of a difficult and most unusual task.

One of the unusual tasks at Châteauroux was the support of new aircraft procurement.

The men in charge of the training face an unusual task.

It's an unusual and very difficult task.