Similar experience here. Heart attack at work in 2009, revived multiple times in ambu & ER, no memory of anything between going unconscious and waking 4 days later in ICU. Same feeling of nothing, no light no darkness just nothing. Though I should mention that as an atheist that is what I expected anyway.....
Posting to undo moderation.
Judo here, perfect geek sport, highly technical and develops great physical control. The full contact nature of Judo also ensures an effective self defense tool, not to mention practical, fun training sessions.
I also add regular resistance training and some weekend cycling but the Judo is what I enjoy most.
I was gonna mention him, "Odd John" comes to mind. Enjoyable read.
...though his invention worked superbly -- his theory was a crock of sewage from beginning to end. -- Vernor Vinge, "The Peace War"