movie review IN THE GREY Running time: 97 minutes. Rated R (violence, language and a sexual reference). In theaters. During “In the Grey,” underworld characters call each other “clever” so many times that the viewer starts to wonder if these trigger-happy people, as well as the man who wrote their repetitive lines, really are clever at all.  Their limited vocabularies wouldn’t suggest as much. Dare I say they all sound like idiots? That man with the uninspired pen is, of course, the guy