I've got the door slamming version. It was most common first year of uni, when I was convinced it was the wardrobe door next to the bed. Still get it once or tw

I've got the door slamming version. It was most common first year of uni, when I was convinced it was the wardrobe door next to the bed. Still get it once or twice a year even now. No lights though. Because it happens at the same time in the sleep cycle, it really feels like the auditory equivalent of a hypnic jerk. Reading the thread, it sounds like there are two rough categories: "door slam" and "guitar feedback". I wonder if they're two different phenomena.