Outside of watching sports, I can't think of another thing on telly that I have ever watched that made me react in a similar way to most of those reactions on that video, than what I saw last night. Having never read the books it completely took me by surprise, and even when I realised that something was up, I was still not prepared for the sheer brutality of it - and sitting there in the shock of what had just happened inside, seeing the final look that the wolf gave Arya as it died had me in pieces.
As much as I hate what happened, I have to say that I think it has made me love the show even more !