Packing and posture

The end of the semester has finally arrived. You are almost finished packing up your dorm room. You walk up the steps into your dorm and open the door to your room. You step up onto a chair to reach the books on your highest bookshelf. It has been quite a while since the last white glove, so a layer of dust covers your books. You throw up your hands and cry "O no!" You then blow away the layer of dust. You gather your books in your arms and step back down off the chair. You decide to test your posture since you have a book so handy. With both hands, you place the book on top of your head and stand as straight as you can. But the book slides right off your head onto the floor. You drop your head and sigh with some disappointment at your bad posture. You lean down to pick up the book and stand up very slowly to ensure your back is straight and relaxed. Once you are in a correct upright position, you place the book back on your head and to your satisfaction, it remains in place! You sigh very contentedly. Just then your roomate walks in and sees you with a book on your head. Your roomate gives you a funny look and sighs. You say in your head voice, "What do you expect? I am a music major after all!" You then finish packing, call "Goodbye!" to all your friends, and head out for your summer vacation!