Need a laugh? Dwayne Johnson appeared on “The Tonight Show“ with Jimmy Fallon to promote his new movie Hercules. The pair discussed how Johnson got in shape for the role, and hilarity ensued. Fallon and Johnson recreated an 80’s workout video, said to inspire Johnson’s current fitness regimen. “You know it’s working when you feel the burn between your legs,” says Johnson. “You gotta hustle for the muscle!” Take a look!