You powerful but imprecise attacks can stun your enemies.
Benefit: You can choose to take a –5 penalty on all melee attack rolls and combat maneuver checks to stun targets you hit with your melee attacks for 1 round. A successful Fortitude save negates the effect. The DC of this save is 10 + your base attack bonus. You must choose to use this feat before making the attack roll, and its effects last until your next turn.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.