- always comes on and goes off and comes on and goes off and a phantom slam has this characteristic; that it never obeys the auditor. The phantom slam may turn on and louse you up on the list as to which item is rockslamming. You don't ever get a phantom slam on an uncharged list. The list has to be "hotter than a pistol" to turn the slam on. Completely aside from the phantom slam this type of case will never do what you tell them. You say, "Has anything been suppressed?" and they don't think about suppressing something, they think about something else. (SH Spec 225, 6212C13)