CGI Behind Game of Thrones

I came across this clip a while back and then forgot about it until now. Anyway, I found it interesting because it shows examples of the CGI magic behind the tv series Game of Thrones. 

I don't know about you, but I can't wait until March 31st for season 3 to begin. GOT is the only series I'll be watching next year. Sorry Arrow, but I'm only using you until I can get my dose of Imp. :P