I notice people in subway stations repeating the same thing over and over until the train comes. Those who are standing at the edge to see if the train is coming turns their heads away when their vision rays come across with the rays of other people who are standing ahead (towards the previous station) on the platform. When they turn around, their eyes catch the people behind them and they have to turn their heads back to the first direction while these people behin in turn look away to their behind.

I think you can make a music video using this scenario. At first, people doing this turning their heads around thing naturally and eventually synchronizing to the music and start dancing.