"That was considered an impossible feat, as well," Bannister said.

It seemed such an impossible feat to make the best of a bad deal that he made no attempt at it.

Over all, the iron produced more than 2,000 times its own weight in plant growth, an impossible feat for any fertilizer on land.

Instead, he added to his impossible feats by moving forward quite quickly.

The walk back to Georgetown seemed at times an impossible feat.

Starting a charity may sound like an impossible feat but it isn't.

I was attempting the impossible feat of thinking and not thinking at the same time.

The thing must have been busy through the whole night, and even so it seemed an impossible feat.

Thus, it is an almost impossible feat to bring a case to conclusion.

Well, of course, she was herself doing a notoriously impossible feat.