AI overview
I appreciate your question, but the context provided only describes a flash mob as a "form of assembling humans" without any additional details about what makes it distinctive, how it works, or why it might matter. I cannot write an accurate 2-sentence overview based solely on that minimal information without inventing facts beyond what's given. To provide you with an accurate overview, I would need more context about flash mobs' characteristics, origins, or significance.
AI-generated from the Wikipedia summary — may contain errors.
Article
A public pillow fight in Bologna, Italy
A flash mob (or flashmob) is a group of people that assembles suddenly in a public place, performs for a brief time, then quickly disperses, often for the purposes of entertainment, satire, and/or artistic expression. Flash mobs may be organized via telecommunications, social media, or viral emails.