Ranbir Kapoor has been learning how to stammer. Surprised? Knowing the actor's penchant for pefection, we are surprised but certainly not shocked. The actor, who played a deaf and mute guy in the film 'Barfi!', is all set to play a man with a stammering problem in his next! He even went to a school in New York to learn stammering. Watch the video to know more!  Show less