Death
It came swift and easy, even quicker than falling asleep.
It was nothing, absence of anything and everything.
Not peaceful nor violent.
It simply was while it wasn't.
He had felt it, just for that tiny millisecond of a moment, he had breathed it.
Death didn't feel like sharing its breath quite yet though. Death snarled when Death recived the soul, a soul that had come in (or was it out?)the wrong way, with a body and things . Annoying. It couldn't stay, it had to be ratified, but it can never return to its origin, it had been spent. In silent aggravation Death threw him out (or was it in?) someplace else. Next time it would come back the right way. Good. Death could continue Death's business without further disturbance.
Sirius Black woke up with a painful gasp and with it he breathed life.
Nothing would ever be the same.