Interestingly enough, there is a video of people doing something similar as part of a religious practice. It's a parody video so excuse the music but at 0:42 they start running/dancing in a similar circular manner too. I wonder how this practice originated: (...)
It's a very far shot but I wonder if this behaviour could be linked to the hivish aspects of human and animal nature?
To quote Haidt's Righteous Mind:
In September 1941, William McNeill was drafted into the U.S. Army. He spent several months in basic training, which consisted mostly of marching around the drill field in close formation with a few dozen other men. At first McNeill thought the marching was just a way to pass the time, because his base had no weapons with which to train. But after a few weeks, when his unit began to synchronize well, he began to experience an altered state of consciousness:
"Words are inadequate to describe the emotion aroused by the prolonged movement in unison that drilling involved. A sense of pervasive well-being is what I recall; more specifically, a strange sense of personal enlargement; a sort of swelling out, but becoming bigger than life, thanks to participation in collective ritual."
McNeill fought in World War II and later became a distinguished historian. His research led him to the conclusion that the key innovation of the Greek, Roman and later European armies was the sort of synchronous drilling and marching the army had forced him to do years before. He hypothesized that the process of "muscular bonding" - moving together in time - was a mechanism that evolved long before the beginning of recorded history for shutting down the self and creating a temporary superorganism. Muscular bonding enabled people to forget themselves, trust each other and function as a unit and then crush less cohesive groups.