Torn Asunder (3.5e Maneuver)

With a sickening crunch you break his neck, then tear his head off his shoulders!

This maneuver may only be used against a pinned or helpless opponent. You may attempt a coup de grace which does not provoke attacks of opportunity as a standard action, dealing damage as if you had confirmed a critical hit and forting a Fortitude save DC 10 + the damage dealt, or die as you tear them to pieces with your bare hands. A successful save negates the instant death, but not the damage.