He raised his head from the floor and sniffed the air.

You haven't got very long left, to sniff the air.

We stood looking at him, and I took a moment to sniff the air.

Before leaving, she sniffed the air, took one last look around.

He sniffed the air again, and decided it would be safe to have some light.

He sniffed the air as if it could tell him something.

No chance in here; you just had to sniff the air.

He sniffed the air, turned his head slowly right and left.

He looked up at the sky and sniffed the air.

It stopped, seemed to sniff the air, looking first one way and then the other.