It seems every time humans devise something novel and outside the box, others contrive to reign it in and leverage it. I noticed it first with the Thriller flash mobs that appeared around the world and on youtube. Many looked like they were impromptu, that is prompted by the occasion and exhibiting little or no preparation. Polished they weren’t but fun to watch. Then others appeared looking like a lot of rehearsal had been done and using experienced dancers. They look great and are still a lot of fun. But is the idea of flash mob becoming a little too commercialised and being taken away from the everyday novel experience? Take for example this fantastic “flash mob” of West Side Story which has clearly been rehearsed by good dancers. It is a great performance and I enjoyed it, but can we really call it a flash mob?