Imagine - you lay in your bed in your gloomy room. You are just falling a sleep, when you hear it, every sleeper's nightmare, buzzing sound. One tiny mosquito has slipped into your room and this bloodthirsty beast flies around your head. You switch lights one, but you can't see it. You start to forage your boxes and seek your Ultimate Electrical Mosquito Repelling Machine. You mash it into plug socket and it starts to spread repellent. Now you are satisfied and can in peace climb back to your bed.
But soon you start to hear strange noise - it sounds like mosquito, but like it would be drunk; it's must more noisy and moves randomly around the room. This is a sound of dying mosquito. It starts again go around my head. And with its last strenght it buzz to you: "I'm ever letting you to sleep..."
