This weekend some will see Idris Elba giving an inspiring speech about monsters and robots and think, That guy should totes play Nelson Mandela. Good thing he will be in the upcoming Mandela: Long Walk to Freedom, an adaptation of the leader's autobiography. And the teaser shows they're not lying about the walking, as it is exclusively Elba doing just that. That being said, as walking impressions go, he totally nails it. It probably helps that he's British and is required to have all that training from the Ministry of Silly Walks.