It was 5.15am, and I drearily walked over to my bed and lay down. In blissful silence, I lay my head down on the pillow and started to drift asleep. The relief that I had craved for what felt like an eternity was about to be mine. At the precise moment, when I was on the cusp of the wake-sleep transition, as I could almost feel my theta pattern of brainwaves degenerate into delta waves, I heard a familiar sound: