it could be...now don't get worried as the condition is believed to be harmless..."Exploding Head Syndrome".

"Although anxiety-provoking, exploding head syndrome is harmless. Attacks most commonly occur in the twilight stage as the individual is falling asleep - less commonly on awakening. People with this condition describe a terrifyingly loud noise - often described as a bang - that lasts only a moment and doesn't occur with headache or other pain.


So that's what it is called - thank you lurking......... I have Exploding Head Syndrome. Love the name, and it really does not hurt at all, but the BANG is very VERY loud.
If I still drove a car it would be very handy to say, 'sorry I smashed into your fence, your car, your house - but I have exploding head syndrome, and it just exploded.
I am glad to have a name for it,
birte