Ringing

You're suddenly awoken by the ringing of your phone. It startles you, so you take a few seconds to adjust to your surroundings. Groggy, you look at the alarm clock; 3:27 am. You reach for your cell phone to see who's calling. Your phone isn't ringing. Come to think of it, that doesn't sound like your ringtone either. And the ringing seems to be coming from under your bed.