Has anyone else ever had the feeling that a firework is going off in your head? It only happens for a milisecond but it feels like a fizz in my head, it's not painful but just a bit strange. It can happen at any time but most often as I fall asleep. I am quite stressed at the moment as a lot of illness in the family, and I take medication for high blood pressure, and I'm overweight apart from that I am quite healthy.