Yesterday my head exploded again.
Instead of happening while I was lying down and falling asleep, I was awake (though tired from lack of sleep from getting up with poor blind Abby several times in the night to take her outside to pee) and walking around.
It’s a benign condition called EHS (Exploding Head Syndrome). I’ve had it all my life, but this time not only was I sort of awake, the explosion was so loud and the jolt so strong, it knocked me to the floor.
Guess I’d better buy one of these. 
= new reply since forum marked as read
vaporizes, so it's no problem.
I always was. In fact, while I was lying there on the floor, I spied in its wrapper a Reese’s Miniature Peanut Butter Cup in pristine condition under the hutch in the kitchen, so I slithered over and ate it.
Hope you feel better right away.
Almost jump out of bed and heart races for a bit. Mine are just a loud boom, sort of like a large book being thrown flat (no bounce) onto a hard floor. Sometimes a feeling of falling comes with it.
Now it has a name.