Was wondering the same thing. Either each volunteer was in a predetermined location with specific uuid'd torches or there some newfangled rfid/bluetooth locatio

Was wondering the same thing. Either each volunteer was in a predetermined location with specific uuid'd torches or there some newfangled rfid/bluetooth location tracking to within one foot or so that I want to know about. My money's on the later, can't trust 100s of people to be where you told them to be during a live performance who aren't professionals.