AMERICAN ULTRA (15) - Sometimes, weird can be truly wonderful.In the case of American Ultra, a bonkers mash-up of a stoner comedy, spy thriller and misfiring romance, a few flickers of starchy convention wouldn't go amiss.Screenwriter Max Landis conjures explosions of cartoon violence and heightened verbal exchanges that look and sound like they have been adapted verbatim from a graphic novel.In fact, this outlandish caper about a dormant CIA assassin, who is hidden in plain sight as a dopehead...
