You knock the sense out of foes with a well-timed surprise attack.
Benefit: Whenever you use a bludgeoning weapon to deal nonlethal sneak attack damage to a flat-footed opponent, roll your sneak attack dice twice, totaling the results as your nonlethal sneak attack damage for that attack.
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.