Harry Styles plays the action hero — with the help from some stunt doubles — in the new music video for “American Girls.”  Directed by James Mackel, the clip finds Styles spending a day on the set: He embarks on a cross-country motorcycle journey, casually drives a sports car underneath a stalled-out semi truck, runs through a desert landscape peppered with explosives, and completes a massive motorcycle flip against a setting sun. Of course, a lot of this is completed with the help of green