Thousands took part in silent ' ` ` night '' at London 's Liverpool Street station . Event , which was phone company advert , was organized over Facebook . 22-year - old organizer now organizes a bigger flashmob event in Leicester Square .
Thousands take part in silent disco `` flashmob '' at London 's Liverpool Street station . Event , which imitated phone company advert , was organized over Facebook . 22-year-old organizer now planning a bigger flashmob event in Trafalgar Square .