Was the actor who played Ser Gregor Clegane dubbed by another actor during his most important dialogue in season 4 of Game of Thrones?
During his most important lines, he seemed almost too good to be true compared to the guy reciting lines in the previous episode - "who am I fighting?". Also there is the fact that the actor who played Ser Gregor is not a professional actor but actually a World's Strongest Man competitor.