I was knocked cold as a kid. Fell backwards and hit my head in the playground. It was strangely pleasant. I was literally in a kid wonderland. When I woke up though, uhhhhhh. Headache. That's what I'm getting at..the after-effects of the knock-out punch. Getting popped in sparring rattles your cage for a split second, then you feel nothing, and I imagine that the knock-out punch itself is painless too since it's BANG, you're out. But when you come to.... do yuo just feel sore or is it a pounding headache?