"Ah, Evangeline, you've noticed something very important! This is what makes rock and roll such a unique style. Even today, there are wide variances and differences in rock. You've got top 40, heavy metal, goth, punk, light rock and many many other styles. On top of that, rock itself came from many different roots, which is also responsible for its diversity. We'll be talking about that in just a moment, too," Antonio promised. "And yes, Satine, the dances where jitterbugs were done were called sock hops."