Evolution of Dance -- Funny YouTube Video

In my forthcoming book I write:

If aliens are watching us, trying to understand human behavior, I think they are most perplexed at dancing. Some kinds of dancing make logical sense – you perform certain actions according to beats or rhythms. But the kind of dancing I stumbled across at high school parties was quite different.

Whereas I actually I have OK dancing abilities -- assuming it's disco/80's music -- I have nothing like this guy in this hilarious YouTube video Evolution of Dance. And I'm sure if you're older than me you will recognize even more of these dance moves to hits of the different decades.