Odd HM Question - Do Knocking Doors Really?

[beyondyou]

The knocks that knock really do knock

man Marni, you've really fallen off your knocker with that statement :lookaroun

 

[raven]

They indeed make their own noise. They have a pin behind the door that pushes out the knocker and when it retracts they fall to hit the door. They are made from cast iron and are quite heavy which is why they are loud.