U might get in trouble but it'll be worth it big time! Okay, first, u hide under her bed right before she gets in. Wait til she's all comfy and make a light groaning sound like a zombie! About five min later, tug on the covers carefully so that she notices. (Hide behind something under the bed if she looks.) Another five min later, scream bloody murder and pull the covers hard! She'll freak out and it'll be hilarious!!!!!