From  Hold-Orsted v. City of Dickson,   2011 U.S. App. LEXIS 10379 (6th Cir. May 24, 2011):
One such justification for an immediate appeal exists in situations "where a party claiming a privilege is 'powerless to avert the mischief of the order.'" Ross, 423 F.3d at 599 (quoting Perlman v. United States, 247 U.S. 7, 13 (1918)).  "Under P ...
From  Hold-Orsted v. City of Dickson,   2011 U.S. App. LEXIS 10379 (6th Cir. May 24, 2011):
One such justification for an immediate appeal exists in situations “where a party claiming a privilege is ‘powerless to avert the mischief of the…