First off, the second MOB project was the one that gained traction publicly with a request to get interviewed by the New York magazine and several other newspapers giving the idea the public eye that allowed it to evolve. The idea of the MOB’s themselves were a simple universal idea, to just congregate in a common area and do things as a group but that thing could easily be nothing.  This was the internets first meme, an easy relatable event that spreads easy through pop culture, the internet galvanized this process, the idea went viral due to the fact that people were bored and latched on to anything that would get them up and moving, get them involved in something. The internet has allowed for instant communication with people all over the word, this helped the spreading of the flash mob to other parts of the country, Bill received emails from Boston, Minneapolis, and other cities. But before the days of the internet this would not have been achievable. Also, the internet allows us to meet and create groups with people who also have a like mind, allowing them to create and build on each others ideas. Thats exactly what happened with this flash mob experiment.