The removable section of cable at the end of an Xbox
controller. The dingus is there so if someone trips over the
controller, or if the
controller is pulled back too hard, the dingus will remain attached to the Xbox but the rest of the controller will be removed, as a way to prevent the Xbox itself from being jostled or from falling onto the floor. The system senses when the controller comes off, and pauses the game until the controller is reinserted into the dingus.