Trent Nelson | The Salt Lake Tribune A rider slides down Main Street on a massive slip 'n slide put up by Slide the City, in Salt Lake City, Saturday August 22, 2015.Trent Nelson | The Salt Lake Tribune A rider slides down Main Street on a massive slip 'n slide put up by Slide the City, in Salt Lake City, Saturday August 22, 2015.Trent Nelson | The Salt Lake Tribune A rider slides down Main Street on a massive slip 'n slide put up by Slide the City, in Salt Lake City, Saturday August 22, 2015.Trent Nelson | The Salt Lake Tribune A rider slides down Main Street on a massive slip 'n slide put up by Slide the City, in Salt Lake City, Saturday August 22, 2015.