The alarm clock goes off, and you lazily reach over to turn it off. But as your hand comes down on the snooze button, you realize that something's not right. The alarm clock is making a strange, high-pitched noise that you've never heard before. As you try to figure out what's going on, you realize that the noise is coming from your phone, which is also on your nightstand. You pick it up and see that there's an incoming call from an unknown number. You answer the call, and a frantic voice on the other end says, "Wake up! There's a fire in your building!" You jump out of bed and look out the window, and sure enough, there are flames and smoke billowing from the building next door. You quickly grab your things and evacuate the building. As you stand outside, watching the fire consume the building, you realize that if you hadn't been woken up by that strange alarm, you would have been trapped inside. So, if you ever hear a strange alarm coming from your phone, don't ignore it – it could just save your life.