This video, by JustinGuitar, starts off by giving a preview of the song that he is about to teach you. He explains that Molly's Chamber by Kings of Leon is a great song for learning to use your power chords. He says that you need to hit the string quite hard, but not to worry about breaking the strings when you do this. He says that you would hurt your fingers long before you were able to actually break a string. Watch this video to learn how to play this great Kings of Lean song.