I once saw the traveling company put on the play Art featuring Judd Hirsch, and then saw a local company's version. The local company was fine, but the national cast amazed me by how much they added to the words. Similarly Carnage is just a filmed play, but with actors you could watch all day. Each actor grips the audience in turn as the two couples dig ever deeper into their assumptions, their fears, and their 18-year-old scotch. Christoph Waltz impressed me most, but I couldn't tell if that was his acting, or just that I'd never seen him on screen. The ending felt gimmicky, but while I enjoyed the dialogue, it's just about the actors, and that's why it was great.