Robert Downey Jr. Coaches Jimmy Through Dramatic Acting Scenes

Robert Downey Jr. reveals some of his acting weaknesses before coaching Jimmy though some of the random emotions he has to fake via green screen as Iron Man. Subscribe NOW to The Tonight Show Starring Jimmy Fallon: Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35/10:35c Get more Jimmy Fallon: Follow Jimmy: Like Jimmy: Get more The Tonight Show Starring Jimmy Fallon: Follow The Tonight Show: http://Twitter