The way I see it, Eddi is a recovering alcoholic who really is trying to stay clean. Not only did this guy pour beer ON him, he inadvertantly poured the beer into Eddie's mouth, which, I think, would count as his first drink since going sober. If that happened to me, I'd be pissed as well, and I sure as hell would have gone after the guy.
I mean, at least Eddie is TRYING to stay sober, unlike, say, Scott Hall...