[w-] Walter White is in the  basement of the [-_] house, making meth. He knows he needs to stop cooking at 午 noon or the meth will be ruined. He has a 午 sundial in the middle of the basement to let him know. But there is no sun, so he ends up burning his meth by cooking past 午 noon. He, in a fit of anger, smashes the 午 sundial once he discovers his mistake. I thought Walter was supposed to be smart?