MiniNail x BMG Quartz Globstopper Banger (14mm)Quartz Globstopper Banger (14mm) The GLOBSTOPPER is the first collaboration between MiniNail and Black Market Glass and features CENTRIPETAL FORCE. Unlike centrifugal force, centripetal force brings everything to the center during rotation. Because the rotation doesnt rotate toward the walls (then up, and down the arm) we are able to cut a lot of the height needed to function properly. Our current height has an arm connection at approximately 1. 4