I thought it was fantastic, I was really happy they kept Oberyn's dialogue during the fight, it added such power to the scene in the book. Everyone's reactions and expressions throughout were great, especially poor Ellaria at the end. But yeah, I did wonder about the head exploding too. I'm just not sure that's what would actually happen. I like the idea of it cracking, makes more sense and they could've incorporated a horrible sound to go with it. I guess they wanted to add one last "wow" at the end there by having it explode... Everything else, I loved.