You commit all your focus to a devastating blow, trying to crush your opponent to the ground.
Benefit: If you use the attack action to make a single melee attack at your highest base attack bonus while using Power Attack and you hit an opponent, you can spend a swift action to attempt a trip combat maneuver against that opponent.
Pathfinder Roleplaying Game Ultimate Combat. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.