You can strike back at enemies who attack you when you move.
Benefit: While using this style, when an opponent makes an attack of opportunity against you for moving through a threatened square, you can spend a swift action to make a retaliatory unarmed strike attack against that opponent. Your attack is resolved after the triggering attack of opportunity.
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.