Last week we mocked 'The Rock' Dwayne Johnson for the photo he posted on Twitter from his fashionable look from the 1990's. But after his appearance on the Tonight Show with Jimmy Fallon, we have to applaud him. Check out this hilarious video Johnson created with Fallon as they pretended to be two trainers. The video is entitled "Hustle to get Muscle" and it is absolutely classic. Richard Simmons should be getting nervous after seeing this one.