All he could hear was a crackling sound that seemed naggingly familiar.

The brown dribble of vomit had a naggingly familiar hospital smell which he couldn't quite place.

The tune issuing from a little tape recorder seemed naggingly familiar.

Of course... no wonder the area had been naggingly familiar.

It was naggingly familiar, but Jessie finally said, "I don't know."

There was something naggingly familiar about the alien, though Jessie could not place just what it was.

There was something naggingly familiar about that head.

"About time you woke up," the face said in a naggingly familiar voice.

The voice was naggingly familiar, but I just couldn't place it.

There was something naggingly familiar about the scene Annie had described.