http://en.wikipedia.org/wiki/Exploding_head_syndromeI had it last night for the first time in a month or so, though I get it very regularly. It's something that's happened since I was very young and I remember some very notable dreams where it occurred. For one I had, it was normal up until I turned down the end of my street onto the highway in the car, when thunder cracked louder than anything and woke me up, much like a screamer. For another, I did have the anxiety and worry, and a sharp incline in my heart rate right before the loud sound, and my body was going through something it regularly goes through before an attack: paralysis. I never get sleep paralysis but I have on multiple, multiple occasions been unable to move or wake myself up right before the loud noise. Nor have I been able to regain myself after certain ones. It's not great.
For anyone who hasn't read the page, it's a form of (usually recursive) auditory hallucination where dreams are spiked by a panic or rise in fear and heart rate, then concluded by a loud noise that sends the person encountering it into a state of shock after waking. I woke up for the first time without being in such a state of complete terror, but all the other occasions I had it, I ended up running out of my room, not setting foot back in there for as much time as possible.
