Kevin Hart - playing a version of himself - is on a death-defying quest to become an action star. And with a little help from John Travolta, Nathalie Emmanuel, and Josh Hartnett Kevin Hart - playing a version of himself - is on a death-defying quest to become an action star. And with a little help from John Travolta, Nathalie Emmanuel, and Josh Hartnett - he just might pull it off详情