I've had that same experience - both with anesthesia and when I briefly blacked out from g-forces at the bottom of a huuuuuuge roller coaster drop. I found the

I've had that same experience - both with anesthesia and when I briefly blacked out from g-forces at the bottom of a huuuuuuge roller coaster drop. I found the experience strangely comforting - basically the closest approximation to what death is like. One second you're there, and the next you're not. It wasn't bad or scary or painful or anything. It was just existence and then nothingness and then the feeling of coming back online realizing what happened. And when I was coming back online, my thinking was: Well, I'm glad to be back! And if I hadn't come back, would I have even noticed? (The answer is no).