Free Online HD on Lookmovie. With this step-by-step defense course from martial arts expert Jim Wagner, you'll learn how to fend off a knife attack. Lessons cover the 12 possible attack angles, primary blocks, the correct grip and Wagner's knife-disarm principle. The class also includes three conflict maneuvers that will help improve your reaction time and swiftness in repelling a knife assault: the freestyle drill, the feeding drill and the one-for-one drill.