Last night on "Late Night," Jimmy Fallon welcomed self-proclaimed World Champion and "30 Rock" star Judah Friedlander to the show. Friedlander, who just released an instructional karate manual called "How To Beat Up Anybody" chatted with Fallon about making the book and even gave some helpful karate tips. For instance, did you know you can actually fight using your own shadow? Or, what's even better, that you can fight other people's shadows? Watch how Friedlander explains shadow fighting and hear some of his other fool-proof fighting tips in the interview below. You just might learn something (keyword: might).