My elderly father lives with me, and at about two in the morning one night, the alarm went off. I was able to get up, and realize it was him. I turned off the alarm. My father had gone outside. As I watched out the window as he was walking around, he came to the door, and the door was locked. He wouldn't have been able to get in on a very cold night, he would have been in trouble. But because of the alarm, I was able to let him in a get him back to bed.
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