As any parent knows, persuading an adolescent to accept rule systems is a difficult trick.

Moving more explicitly into this territory may prove a difficult political trick to pull off.

In the biological realm, this is a difficult trick to pull off.

They are able to fly very close to each other and do very difficult tricks.

A hang ten nose manual is a very difficult trick because it requires a lot of balance.

But he doesn't really do much with his central situation other than to work the difficult trick of making it plausible.

That free-fall effect is the most difficult trick a hairdresser can attempt.

He pulls off that difficult trick of making you care.

The most difficult trick, he'd found, was to speak all this nonsense with an absolutely straight face.

He looked like a dog waiting to be complimented for doing a particularly difficult trick.