Some things should not be a secret
For the love of all things both choreographed and spastic, please go to here.
If you want me to rationalize this as having anything to do with cycling, well there's plenty of spandex and awareness of one's physical space (just like the peleton). And it is revolutionary.
If you want to know why I love it, well, I watched a lot of "Fame" growing up and longed for the day when a random group of people would just break into a soul-liberating, seemingly spontaneous, yet remarkably choreographed dance number. And now we can.