Given that it stars a veritable “Who’s Who” of modern action stars — e.g., Tony Jaa, Tiger Chen, Iko Uwais, Scott Adkins, Michael Jai White — it should go without saying that Jesse V. Johnson’s Triple Threat boasts some pretty impressive fights. I pressed “Rewind” on several occasions so that I could watch certain bad-ass moves again, particularly from Chen and Adkins, and I winced more than once at scenes of particularly brutal carnage. As an added bonus, Triple Threat possesses a certain gritty, DIY feel that adds to its intensity. I just wish the storyline had been a wee bit stronger. It’s promising at points, with a pair of mercenaries on the run from some other mercenaries while protecting a Chinese heiress, but got muddled whenever it tried to inject some humor or backstory into the proceedings.