Wait, Wha!!! All our rock work gone, ERRRRR Oichi looked around but could not figure out who had done it and sighed. She then began to pick up more rocks to help her fellow Gryffie friends start a new ring around the fire pit.

As she worked she heard the professor ask another question and raised her hand and responded, "Muggles use fires for smoke signals to signify they are in trouble or lost.". Yes that seems about right.