As you pace back and forth in your bedroom, you suddenly hear a sound come from the direction of your door. Your eyes grow wide. You stop in your tracks and listen for another sound.The sound is a slight squeak, like the sound made when the door handle is pulled down. It's followed by another sound, like the sound of the door slightly creaking open.Do you stay in your room? Or do you go to check what's going on in the living room?