VIDEO : Robert Downey Jr. Responds To Chris Evans' Heartfelt Tweet

Chris Evans recently tweeted a heartfelt message about wrapping up Avengers 4. In the tweet he said it was ?an honor? to play the role of Captain America. According to Comicbook,com, Robert Downey Jr. has responded to the tweet. Downey Jr. shared a photo of a ?Toy Story? parody of ?Avengers: Infinity War.? In the caption he wrote: ?We all know who the real sheriff in town is @ChrisEvans.?