He has been back there knocking on the door and tonight he put it up front at the end.

On the one hand, I think it's really disturbing to have the FBI come knocking at your door, demanding to look at things you've been reading. It smacks of a Gestapo state. On the other hand, it's so heavy handed to be almost ludicrous.

His withered fist still knocking at Death's door.

We have been knocking on everyone's door. My knuckles are blue.

We often get in quicker by the back door than by the front

The Back Bay of Biloxi came through our front door,