Group of People That Suddenly Performs in Public

This page is the CodyCross answer for the clue below from All Things Water, Group 1288, Puzzle 3 (White Water Rafting).

Question is: Group of People That Suddenly Performs in Public

and the answer is: FLASHMOB

Word Meaning:

FLASH MOB — A group of people who rapidly assemble, perform an unusual and seemingly pointless act, and then quickly disperse.

Definitions from Wiktionary.