I think it's fair to say The Mountain is not any Game Of Thrones fan's favorite character at the moment, but the actor who plays him does attempt to bring some joy to a kid on his birthday..even if he winds ups caring the bejaysus out of him in the process! Icelandic strongman Hafþór Júlíus Björnsson underwent a 2 hour makeup job to become the Incredible Hulk and attend a children's party. The birthday boy is initially scared (can you blame him?) but pretty soon joins in the fun. There's no subtitles in the vid, but you should get the gist.