When a Jumbotron just isn't an option
Don't fret. If you can't afford an appropriately sized Jumbotron for your annual revolutionary celebration, you can just assemble tens of thousands of people with multi-colored placards and it pretty much accomplishes the same thing--all at a much more affordable price. Yes, that Korean language banner in the distance is made up entirely of people holding colored cards turned at the appropriate times. Another marvelous celebration of some oh so human ingenuity.