One of the growing trends on YouTube is rap battles between pop culture icons. They've had everyone from Hitler and Abe Lincoln to Stephen Hawking and Albert Einstein face off. Well, the latest rap battle may be the greatest of all time! Hodor from Game of Thrones takes on Groot from Guardians of the Galaxy. And it is EVERY bit as awesome as you would expect. Check it out below. And, oh by the way, you might want to turn the sub titles on after the first viewing.