The flash mob version of massive pillow fights is distinguished by the fact that nearly all of the promotion is Internet-based.
[citation needed] Word of the events spreads primarily via digital means, usually on the internet via email, chat rooms and text messaging which result in seemingly spontaneous mass gatherings.
[4][1] According to The Wall Street Journal, more than 5,000 participated in New York City, overtaking London's 2006 Silent Disco gathering[5][6][7] as the largest recorded flash mob.
Participating cities included Atlanta, Beirut, Boston, Budapest, Chicago, Copenhagen, Dublin, Houston, Huntsville, London, Los Angeles, Melbourne, New York City, Paris, Pécs, San Francisco,[9][10] Shanghai, Stockholm, Sydney, Székesfehérvár, Szombathely, Vancouver, Washington, D.C., and Zürich.
[11][12] While ordinary pillow fights have existed for a long time, these events are massive in scale, occur in public and are promoted primarily via the internet.