Lara was sitting calmly listening to the students suggesting spells ,each time she thinks of one someone else say it, they were really fastbut she should say one at least. So she wanted to ask them to be calm for a couple of seconds but that was surely impossible so she tried to think very hard and remember what her father used to teach her , she wished she had listened to him before, but it as too late. And yes she remembered one "Tarantallegra!" Lara said suddenly jumping excitedly "It makes the person unable to control his legs as they move randomly" Lara added as she got a grip on herself. She hoped that no one else had said it because it would have been really stupid.