...You Really Got Me delivered something very different. It is taut but increasingly hysterical, hard driven and explosive, an out-and-out rocker. It is more riff than song. And what a riff. It consists of just two power chords, three strings of the guitar, sliding up and down over two frets, striking five times in three beats of the bar then restarting after the fourth beat. It has a feeling of being chopped off in its prime and constantly restarted, spluttering like a motorbike getting ready to race, a jerky, stop-start quality that creates an incredible sense of urgency. It was...