Why does music make people jig about like a possessed being?

Some people dance like geriatrics that are having an epileptic fit

The vibrations of music connect animals to their [i]own[/i] vibrations. The people ARE possessed - by God.

Alcohol just makes it worse. Makes people think they can break dance or their disco moves are cool.

Some move like they got ants in their pants or have to relieve themselves bad.

Something primal I think.