It can never hurt to learn how to protect yourself… unless your instructor is Goofy. The Art of Self Defense, which hit theaters on this day in 1941, humorously explores the history of self defense — from the Stone Age to the present day. Starting with scientific conditioning, Goofy, in typical “how to” fashion, demonstrates everything from shadow boxing to jump roping, before a big night in the boxing ring. Amidst a hundred thousand spectators, Goofy steps into the ring, and within seconds, it’s all over — Goofy is knocked out cold. This cartoon short may not instill in you a great knowledge of how to defend yourself, but it is sure to knock you out with laughs.