All right, I'm in a car that keeps knocking into something.

The man kept knocking on the door until finally he got tired and stopped.

"Because you kept knocking my elbow trying to get your ship out of the way!"

Keep knocking on the door and hopefully it will open.

They'll keep knocking off the leaders on both sides, one after the other.

"If you keep knocking on the door hard enough, the door's going to open," he said.

"You just keep knocking people down until they don't get up."

The pain in his right arm was getting worse now, because she kept knocking against it.

And yet, something kept knocking at the back of his brain.

Oh that's nice but people keep knocking little bits off it.