Thousands of People are Having a Massive Water Gun Fight at Yonge Dundas Square By Notable Life By Notable LifeView Author|April 17, 2015|LifeView Life First came news that a massive Slip-In-Slide would take over the city. Now, even more nostalgic water-filled fun is set to hit downtown Toronto. We’re talking about a massive water gun fight right in the middle of the city at... View this article.