Rubiey put her hand up timidly, she knew this stuff. It was practically drummed into them at her old Muggle Boarding School. "Erm, isn't it Cardiopulmonary Resusiation, sir?" She said quietly to Professor Zookara. She didn't want to seem like a swat which she totally was. "You have to perform at least 100 chest compressions per minute, if they aren't breathing." She said, growing steadily redder. Speaking in class was not something she enjoyed.