The last time Josh Hartnett can recall doing his own stunts for a movie, he was 29. So, it felt like a bit of a left-field choice for Hartnett to star in a wacky assassin thriller that could be described as “Bullet Train on a plane.” But for Hartnett, Fight or Flight was exactly what he wanted to do next. “I wanted to make something that was going to have a unique tone, and I so badly wanted to do my own stunts,” Hartnett tells Inverse. Josh Hartnett and Charithra Chandran in Fight or Flight. Fight or Flight leaves things on a notably open-ended note, with Lucas finding himself caught up in yet another situation.