Bus driver who made gun threat cannot sue after termination

Madison Heights school bus driver was involved in a "contentious" running dispute with another driver over scheduling.  At a meeting set by administrators and union reps to attempt to resolve the dispute, the bus driver packed her things and left prematurely, stating she'd take the matter up with the Superintendent and "...bring her gun."  She met with authorities investigating the matter several times, but on advice of counsel she refused to discuss the matter.  She was then terminated and sued the  school and the union for inadequate representation.  The trial court and Court of Appeals dismissed her claim.  Some careless statements are just too inflammatory:  making jokes about a gun at school or at work has become sort of like making bomb jokes in an airport.