Vin Diesel is known for his muscular appearance, deep voice and charming smile. That has allowed Vin Diesel to build a solid franchise movie career, especially with the international success of the Fast and Furious movie franchise. You would think that his voice performance as Groot in Guardians of the Galaxy would be just as powerful…but he only has one line. He literally says “I AM GROOT!” in many different ways…at different times throughout the movie. Can you believe it? Good ole Vin Diesel only says the same line over and over and over again. Fortunately, that made it much easier for him to record his lines in different languages, which is exactly what Jimmy Fallon tested him on at The Tonight Show in this hilarious video.