'Is This Thing On?' review: Will Arnett and Bradley Cooper flop on stand-up comedy

'Is This Thing On?' review: Will Arnett and Bradley Cooper flop on stand-up comedy

As an actor, Bradley Cooper can be exciting and explosive because he refuses to take himself all that seriously. In critically heralded films like Silver Linings Playbook, American Hustle, even Guardians of the Galaxy, where he voiced Rocket Raccoon, he gamely plays the fool, egotistical, wrathful, and/or uncouth. Yet as a filmmaker, Cooper is tediously serious, even when making the divorce-centered comedy Is This Thing On? Curiously, Cooper doe…