You’re half-asleep, sliding toward that blissful blackout, and then it happens. A bang. A crash. A gunshot-level noise that feels like it came from inside your skull. You sit straight up, fully awake ...

Have you ever been drifting off to sleep when suddenly you hear what sounds like a gunshot, a door slamming, or an explosion inside your head? You jolt awake, heart pounding, sit upright in bed, but ...