I must admit I've never been hit so hard that I am 100% knocked out, so I can't really speak as to the subjective experience of being knocked out (from the non-physical consciousness perspective, not the brain)... but surely it isn't like disconnecting from World of Warcraft?

That said, if the injury is serious enough I suppose it might trigger some Near Death Experience where people have reported seeing things purportedly on the other side.

So I guess that answers my original concern.

(I think you might have confused my question though, or perhaps I've confused you. No worries, my questions are answered anyway.)