The most promising places to look for HCSSs are clusters of galaxies, for two reasons: first, most of the galaxies in a galaxy cluster are elliptical galaxies which are believed to have formed through mergers. A galaxy merger is a prerequisite for forming a binary SMBH, which is a prerequisite for a kick. Second, the escape velocity from a galaxy cluster is large enough that a HCSS would be retained even if it escaped from its host galaxy.