For weeks, J.R. Martinez and his dancing partner Karina Smirnoff have been sailing through the competition on ABC’s Dancing With the Stars—but last night, the Army Veteran had an off night. "We're all going to have a bad week," the Salvadorian Martinez told People.com backstage at Monday night's show. "If America pulls us through, I'm going to bust my ass this coming week and I'm going to come back strong."