Imagine …. it’s the middle of the night. You have heard your older sister get up to get a drink of water. As she walks towards the kitchen you decided to sneak up behind her. Careful now, you have to step lightly so that there are no creaks, no sounds, she cannot hear you. Oooops, she turns around! Make sure you are in the shadows. She finally reaches where you are standing BOO! Your sister screams with terror.