Okay, this is going to be hard to explain so bear with me. For years now I've been having an odd occurrence when I try to sleep. When I'm just about asleep and half already dreaming about something, I will suddenly, without any warning, see (literally see!) a flash of static snow before my eyes like you'd see on a television just before it shorts out. The image is often coupled by a pop sound that can range from very faint to headache inducing. After it's over, my mind will literally go blank for a few seconds. Whatever I was dreaming about will stop and I'll usually wake up. I've tried to research this online but have come up with hardly anything. Does anyone know what this is or where I can find more information on it? I know it sounds weird but I'm really confused. I want to know what's going on.