monstration

noun2

1. •
   A kind of flash mob popular in Russia, where young people take to the streets with homemade banners and placards sporting absurd, non-political slogans.
2. •
   (no longer used) The act of demonstrating; proof.

   • Representation, or the art of making absent Persons and things present, as often as is requisite—this is imitation, monstration, or demonstration of persons and things — 1895