The Gallop Rhythm by Matthias Young is a free guitar lesson that will teach you a strumming rhythm. The gallop rhythm has been used by many different artists such as Iron Maiden and Metallica. In the video, Matthias will show you three different examples of this rhythm in action. You can then apply this concept to your own playing. Two key elements in playing the gallop rhythm sucessfully are staying relaxed and maintaining the picking pattern. If you start off by practicing slowly and then gradually increasing your speed, it should help you play more accurately.