Huh? What happened? It can't be kryptonite, because he didn't give any hint that he felt it before he was punched - in fact, he was looking through the back of the truck just moments before. The only answer I can come up with is that they're in some kind of virtual world, but even that doesn't seem too likely.
Whatever, I'm intrigued and the story-telling just goes from strength to strength, Sue.
Yvonne