I don't think I'm misremembering at all. If I am to believe Busiek, Priest wanted to shoot an Avenger for comedic effect -- and Busiek nominated Thor because he was tough enough to survive a shot to the head, but would briefly pass out from the shock of the impact.
Certainly Busiek and Priest discussed the issue in depth, since (according to Busiek) Priest came to him for advice.
I skimmed the archives earlier and from what was said in some of the posts I read, it seemed Busiek didn't know that Thor was knocked out as he responded to someone that knocking a person over with a surprise hit isn't about their strength, but balance. Someone-- I believe it was you, actually-- pointed out to him that Thor wasn't simply knocked over, but knocked out.
I don't know if their discussion was about a light-hearted scene or a dramatic one.