The year was 1956.  Elvis Presley, only a mere 21 years old, was already making huge waves on American radio. Already a bonafide “RCA Victor Recording Star,” his songs “Heartbreak Hotel”, “Don’t Be Cruel” and “Hound Dog” had absolutely blown up the airwaves. But the part that’s a little difficult for us to appreciate 70 years later is how much of a wave he was also making with his physical presence — particularly his hips — during his live shows.