Don't knock the food--it's free.
he gave the table a whack.
he got a bang on the head.
He knocked the glass clear across the room.
he took a bash right in his face.
he was tapping his fingers on the table impatiently.
knock on the door.
My car bumped into the tree.
the car pinged when I put in low-octane gasoline.
The car pinked when the ignition was too far retarded.
the knocking grew louder.
The paper criticized the new movie.
the school of hard knocks.
the sudden knock floored him.