Why are you out here by yourself looking so fine like that?... “ But that shock factor is what gets people to make that change.” Advertisement Chaikin, a communications major in her senior year, came up with the initiative after PSA’s flagship event, Occupy McKeldin, last spring.... One of its guest speakers was street artist Sophie Sandberg, who runs Chalk Back, a global movement where activists use sidewalk chalk to recount stories of harassment word for word in the locations where they happ