You can take your opponent’s weapon after being stabbed in the back.
Benefit: Whenever an enemy deals damage to you with a melee weapon as part of a flanking attack or sneak attack, you can make a combat maneuver check to disarm against that opponent as an immediate action. You must have at least one hand free when you use this feat. When you use this feat, you take a –4 penalty to your AC until your next turn. You can only use this feat once per round.
Pathfinder Player Companion: Dragon Empires Primer © 2011, Paizo Publishing, LLC; Authors: Tim Hitchcock and Colin McComb.