Just remember that Granny won't be just dosing in her rocking chair waiting for you to do it. She will be roaming the house, looking into rooms and listening out to every little sound. She hears very well, so don't make a lot of noise. If you behave yourself incautiously, she will appear on the doorstep swishing her heavy weapon. And before you know it you'll be knocked unconscious. When you come to your senses, you will be upstairs and will have to start everything over. And you will be one day short.