We had Officer David Silva and Officer Percy Smith go up and knock on the door,

If opportunity doesn't knock, build a door.

You can't knock on opportunity's door and not be ready.

I managed to knock him off his pedestal for a week.

I knew the door I wanted. I knocked.

As they turned (toward the back door) to knock the fire down, the interior ceiling -- made of plaster of lath -- came down on their heads. They got themselves together somewhat and tried to move to the exit, but in the back porch area, they got lost from each other.